diff --git a/eo/src/eoPop.h b/eo/src/eoPop.h
index e6cf0aef..363ee005 100644
--- a/eo/src/eoPop.h
+++ b/eo/src/eoPop.h
@@ -49,76 +49,87 @@ to the population.
 template<class EOT>
 class eoPop: public vector<EOT>, public eoObject, public eoPersistent {
 
-/// Type is the type of each gene in the chromosome
-#ifdef _MSC_VER
-	typedef EOT::Type Type;
-#else
-	typedef typename EOT::Type Type;
-#endif
-
- public:
-	/** Protected ctor. This is intended to avoid creation of void populations, except 
-	    from sibling classes
-	*/
-	eoPop()	  :vector<EOT>() {};
-	
-	
-	 /** Ctor for fixed-size chromosomes, with variable content
-	@param _popSize total population size
-	@param _eoSize chromosome size. EOT should accept a fixed-size ctor
-	@param _geneRdn random number generator for each of the genes
-	*/
-	eoPop( unsigned _popSize, unsigned _eoSize, eoRnd<Type> & _geneRnd )
-	  :vector<EOT>() {
-	  for ( unsigned i = 0; i < _popSize; i ++ ){
-	    EOT tmpEOT( _eoSize, _geneRnd);
-	    push_back( tmpEOT );
-	  }
-	};
-	
-	/** Ctor for variable-size chromosomes, with variable content
-	    @param _popSize total population size
-	    @param _sizeRnd RNG for the chromosome size. This will be added 1, just in case.
-	    @param _geneRdn random number generator for each of the genes
-	*/
-	eoPop( unsigned _popSize, eoRnd<unsigned> & _sizeRnd, eoRnd<Type> & _geneRnd )
-	  :vector<EOT>() {
-	  for ( unsigned i = 0; i < _popSize; i ++ ){
-	    unsigned size = 1 + _sizeRnd();
-	    EOT tmpEOT( size, _geneRnd);
-	    push_back( tmpEOT );
-	  }
-	};
-
-	/** Ctor from an istream; reads the population from a stream,
-	    each element should be in different lines
-	    @param _is the stream
-	*/
-	eoPop( istream& _is ):vector<EOT>() {
-	  readFrom( _is );
-	}
-	
-	///
-	~eoPop() {};
-
-  	/** @name Methods from eoObject	*/
-	//@{
-	/**
-	* Read object. The EOT class must have a ctor from a stream;
-	in this case, a strstream is used.
-	* @param _is A istream.
-
-	*/
+  /*
+   Victor Rivas (vrivas@ujaen.es): 15-Dec-1999
+   An EO can have NO genes.
+   /// Type is the type of each gene in the chromosome
+   #ifdef _MSC_VER
+   typedef EOT::Type Type;
+   #else
+   typedef typename EOT::Type Type;
+   #endif
+  */
+  
+public:
+  /** Protected ctor. This is intended to avoid creation of void populations, except 
+      from sibling classes
+  */
+  eoPop():vector<EOT>() {};
+  
+  
+  /** Ctor for fixed-size chromosomes, with variable content
+      @param _popSize total population size
+      @param _eoSize chromosome size. EOT should accept a fixed-size ctor
+      @param _geneRdn random number generator for each of the genes
+  */
+  /*
+    Victor Rivas (vrivas@ujaen.es): 15-Dec-1999
+    This constructor must be substitued by one using factories.
+  eoPop( unsigned _popSize, unsigned _eoSize, eoRnd<Type> & _geneRnd )
+    :vector<EOT>() {
+    for ( unsigned i = 0; i < _popSize; i ++ ){
+      EOT tmpEOT( _eoSize, _geneRnd);
+      push_back( tmpEOT );
+    }
+  };
+  */
+  
+  /** Ctor for variable-size chromosomes, with variable content
+      @param _popSize total population size
+      @param _sizeRnd RNG for the chromosome size. This will be added 1, just in case.
+      @param _geneRdn random number generator for each of the genes
+  */
+  /*
+    Victor Rivas (vrivas@ujaen.es): 15-Dec-1999
+    This constructor must be substitued by one using factories.
+    eoPop( unsigned _popSize, eoRnd<unsigned> & _sizeRnd, eoRnd<Type> & _geneRnd )
+    :vector<EOT>() {
+    for ( unsigned i = 0; i < _popSize; i ++ ){
+    unsigned size = 1 + _sizeRnd();
+    EOT tmpEOT( size, _geneRnd);
+    push_back( tmpEOT );
+    }
+    };
+  */
+  /** Ctor from an istream; reads the population from a stream,
+      each element should be in different lines
+      @param _is the stream
+  */
+  eoPop( istream& _is ):vector<EOT>() {
+    readFrom( _is );
+  }
+  
+  ///
+  ~eoPop() {};
+  
+  /** @name Methods from eoObject	*/
+  //@{
+  /**
+   * Read object. The EOT class must have a ctor from a stream;
+   in this case, a strstream is used.
+   * @param _is A istream.
+   
+   */
   virtual void readFrom(istream& _is) {
     while( _is ) {  // reads line by line, and creates an object per
       // line
       char line[MAXLINELENGTH];
       _is.getline( line, MAXLINELENGTH-1 );
-	  if (strlen( line ) ) {
-		istrstream s( line );
-		EOT thisEOT( s );
-		push_back( thisEOT );      
-	  }
+      if (strlen( line ) ) {
+	istrstream s( line );
+	EOT thisEOT( s );
+	push_back( thisEOT );      
+      }
     }
   }
   
@@ -127,18 +138,18 @@ class eoPop: public vector<EOT>, public eoObject, public eoPersistent {
    * @param _os A ostream. In this case, prints the population to
    standard output. The EOT class must hav standard output with cout,
    but since it should be an eoObject anyways, it's no big deal.
-   */
+  */
   virtual void printOn(ostream& _os) const {
     copy( begin(), end(), ostream_iterator<EOT>( _os, "\n") );
   };
-
+  
   /** Inherited from eoObject. Returns the class name.
       @see eoObject
   */
   virtual string className() const {return "eoPop";};
-    //@}
-
- protected:
-
+  //@}
+  
+protected:
+  
 };
 #endif