The group structure of Hecke groups H $(lambda_q)$
Extensions of Caristi-Kirk's theorem
Normal boundary value problems for differential equations of higher order
F. G. MAKSUDOV, Z. I. ISMAILOV
Absolutely representing systems and convolution operators in the complex domain
Rings in which strongly prime right ideals are finitely generated
$T_2$-objects in categories of filter and local filter convergence spaces