中国科学院数学与系统科学研究院期刊网
Positive Solution for a Class of Singular Second-order Four-point Boundary Value Problem with Sign Changing Nonlinearity
XIE Dapeng, LIU Yang, BAI Chuanzhi, FANG Ming
Acta Mathematicae Applicatae Sinica . 2010, (1): 171 -180 .  DOI: 10.12387/C2010018