On the existence and uniqueness of the maximum likelihood estimators of normal and lognormal population parameters with grouped data. Xia, Jin; Mi, Jie; Zhou, Yanyan — 2009 Journal of Probability and Statistics
Existence of solution and positive solution for a nonlinear third-order m -point BVP. Sun, Jian-Ping; Jin, Fan-Xia — 2010 Fixed Point Theory and Applications [electronic only]