Janos Karatson, Sergey Korotov:
Sharp upper global a posteriori error estimates for nonlinear elliptic variational problems
Mohmed H. Saleh, Samir M. Amer, Marwa H. Ahmed:
Existence results for non-linear singular integral equations with Hilbert kernel in Banach spaces
Fengquan Li, Weiwei Sun:
Hyperbolic boundary value problem with
equivalued surface on a domain with
thin layer