Kosmatov Nickolai: A coincidence problem for a second-order semi-linear differential equation. (2020)
Kosmatov Nickolai: A coincidence problem for a second-order semi-linear differential equation. (2020)
Kosmatov Nickolai: Solutions to a class of nonlinear differential equations of fractional order. (2009)
McArthur Summer; Kosmatov Nickolai: A note on the second order boundary value problem on a half-line. (2009)
Kosmatov Nickolai: Countably many solutions of a fourth order boundary value problem. (2004)