On finite groups whose every proper normal subgroup is a union of a given number of conjugacy classes Ali Reza AshrafiGeetha Venkataraman OriginalPaper Pages: 217 - 224
Characteristic properties of large subgroups in primary abelian groups Peter V. Danchev OriginalPaper Pages: 225 - 233
Superstability of the generalized orthogonality equation on restricted domains Soon-Mo JungPrasanna K. Sahoo OriginalPaper Pages: 253 - 267
Non-linear second-order periodic systems with non-smooth potential Evgenia H. PapageorgiouNikolaos S. Papageorgiou OriginalPaper Pages: 269 - 298