?url_ver=Z39.88-2004&rft_id=MTMT%3A1672786&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=P%C3%A9ics&rft.aufirst=Hajnalka&rft.au=+P%C3%A9ics+Hajnalka&rft.atitle=Positive+Solutions+of+Neutral+Delay+Differential+Equation&rft.title=NOVI+SAD+JOURNAL+OF+MATHEMATICS&rft.issn=1450-5444&rft.date=2002&rft.volume=32&rft.pages=95-108&rft.genre=article