?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Facta.bibl.u-szeged.hu%2F42243%2F&rft.title=Multiple+positive+solutions+of+nonlinear+singular+m-point+boundary+value+problem+for+second-order+dynamic+equations+with+sign+changing+coefficients+on+time+scales&rft.creator=+Xu+Fuyi&rft.date=2010&rft.type=Foly%C3%B3irat&rft.type=NonPeerReviewed&rft.format=part&rft.language=hu&rft.identifier=http%3A%2F%2Facta.bibl.u-szeged.hu%2F42243%2F1%2Fejqtde_2010_020_001-013.pdf&rft.identifier=+++Xu+Fuyi%3A+++Multiple+positive+solutions+of+nonlinear+singular+m-point+boundary+value+problem+for+second-order+dynamic+equations+with+sign+changing+coefficients+on+time+scales.++(2010)+++