Warning message Node revision 508 not found in node Mechanical properties study for graphene sheets of various size . Perharps it was deleted. Poddubny Alexey A. RussiaRostov-on-Don Southern Federal University, Rostov-on-Don, Russia, Russia, 344006, Rostov-on-Don, B. Sadovaia str., 105 poddubny_sfedu@mail.ru Author's articles On Some Models of Indentation for Functionally-Graded Coatings