A note on double sequences of fuzzy numbers
$T_2$-objects in categories of filter and local filter convergence spaces
The group structure of Hecke groups H $(lambda_q)$
On the additive group structure of nonstandard models of Z
On comformally flat Lorentzian spaces satisfying a certain condition on the curvature tensor
Normal boundary value problems for differential equations of higher order
F. G. MAKSUDOV, Z. I. ISMAILOV
($sigma$, $tau$)-Lie ideals in prime rings with derivation
Rings in which strongly prime right ideals are finitely generated