1
by Pap, E.
Published 1999
Springer Netherlands

2
by Hadzic, O., Pap, E.
Published 2001
Springer Netherlands

3
by Pap, E., Takaci, Arpad, Takaci, Djurdjica
Published 1997
Springer Netherlands

4
by Klement, Erich Peter, Mesiar, R., Pap, E.
Published 2000
Springer Netherlands