%A Xu Fuyi %N 79 %P 1-14 %D 2010 %L acta42302 %O Bibliogr.: 14. p. %K Laplace-egyenlet, NemlineĂĄris hatĂĄrĂŠrtĂŠk problĂŠma - pozitĂv megoldĂĄsok %T The existence of positive solutions for nonlinear boundary system with p-Laplacian operator based on sign-changing nonlinearities