Goncharov P. P. RussiaRostov-on-Don Southern Federal University, ul. Bol`shaya Sadovaya 105/42, Rostov-on-Don, 344006, Russia petro_zzz@rambler.ru Author's articles INVESTIGATION OF STABILITY OF NONLINEAR NORMAL MODES IN ELECTRICAL LATTICES DISCRETE BREATHERS IN SCALAR DYNAMICAL MODELS ON THE PLANE SQUARE LATTICE DISCRETE BREATHERS AND QUASIBREATHERS IN NONLINEAR MONOATOMIC CHAINS