Warning message Node revision 508 not found in node Theoretical investigation of the deformed graphene nanostructures . Perharps it was deleted. Node revision 510 not found in node Theoretical investigation of the deformed graphene nanostructures . Perharps it was deleted. Kobilzoda Mirzoodil Mirzomalik Russia Tajik National University, 17 Rudaki Ave., Dushanbe 734025, Republic of Tajikistan kobilzoda94@mail.ru Author's articles On the Positive Solutions of a Model System of Nonlinear Ordinary Differential Equations