public boolean equals(Object other) {
         if ( (this == other ) ) return true;
		 if ( (other == null ) ) return false;
		 if ( !(other instanceof BiCopiesarticlesId) ) return false;
		 BiCopiesarticlesId castOther = ( BiCopiesarticlesId ) other; 
         
		 return (this.getNoArticle()==castOther.getNoArticle())
 && ( (this.getIsbn()==castOther.getIsbn()) || ( this.getIsbn()!=null && castOther.getIsbn()!=null && this.getIsbn().equals(castOther.getIsbn()) ) );
   }