许 丽,李顺初,王俊超.考虑二次梯度影响的球向渗流问题解的相似结构[J].重庆工商大学学报(自然科学版),2011,28(6):585-589
XU Li, LI Shun-chun, WANG Jun-chao. Similar Structure of the Solutions to Radial-Spherical Seepage Problem Considering Quadratic Gradient Effect[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),2011,28(6):585-589