Qingliu Yao (2001). Positive Solution of Two-Point Boundary Value Problem for Classical Emden Equation with Coefficient that Changes Sign. Acta Analysis Functionalis Applicata.
Jiang Xiufen, Yao Qing-liu (2001). An existence theorem of positive solutions for elastic beam equation with both fixed end-points. Applied mathematics/Applied Mathematics. A Journal of Chinese Universities/Gao-xiao yingyong shuxue xuebao.DOI
Yao Qing-liu (2001). EXISTENCE AND MULTIPLICITY OF POSITIVE RADIAL SOLUTIONS FOR A CLASS OF NONLINEAR ELLIPTIC EQUATIONS IN ANNULAR DOMAINS. Chinese Annals of Mathematics,series A.