Warning message Node revision 527 not found in node Determination of the Wall Temperature Change for a Cavity in a Solid as a Result of the Temperature Change of the Gas Flow in a Cavity. Perharps it was deleted. Alkin Ruslan V. RussiaPetrozavodsk Petrozavodsk State University, 33, Lenina ave., Petrozavodsk, 185910, Russia 5th year studentruslan5.ru@yandex.ru Author's articles Stability of Periodic Billiard Trajectories in Triangle