@article {BHI00a,
	title = {On a well solvable class of the {PNS} problem},
	journal = {Novi Sad Journal of Mathematics},
	volume = {30},
	number = {3},
	year = {2000},
	pages = {21-30},
	author = {Z. Bl{\'a}zsik and Cs. Holl{\'o} and B. Imreh and Cs. Imreh and Z. Kov{\'a}cs}
}
