Muller, Jean-Marie Non-violence in education / Jean-Marie Muller. - Paris : UNESCO, 2002. - 73 p. - Ed-2002/WS/23 . International Decade for a Culture of Peace and Non-Violence for the Children of the World, 2001-2010 No. de Clasificación Universal Decimal: 7.017.7 (100) =20 "2002" MUL.