%A Bai Chuanzhi %N 30 %P 1-14 %D 2010 %L acta42253 %O Bibliogr.: p. 13-14. %K HatĂĄrĂŠrtĂŠk problĂŠma - pozitĂv megoldĂĄsok, FunkcionĂĄlis differenciĂĄlegyenlet %T Existence of positive solutions for boundary value problems of fractional functional differential equations