TY - CPAPER AU - Y. Stanishevskiy TI - THE SYMMETRY IN THE SYSTEMS OF KEY-RELATIONSHIP AND THE PROBLEM OF REVERSIBILITY OF THE RELATIONS BETWEEN THE TONALITIES T2 - International Multidisciplinary Scientific Conference on Social Sciences and Arts SGEM2014, Book 4 PY - 2014 DO - 10.5593/sgemsocial2014/b41/s12.011 PB - STEF92 Technology ER -