“…http://www.journals.vu.lt/nonlinear-analysis Our main tool is analysis method and iterative technique as well as some suitable estimations. Here, in order to make the article more complete, we also recall some analysis methods and numerical techniques, which have been used to study various nonlinear ordinary differential equations and partial differential equations such as iterative methods [9,11,28,29,42,43,48,54,60,61,72,76,81,84,86], variational methods [17, 31-33, 36-39, 41, 46, 62, 67, 74, 78, 80, 83, 88, 89], fixed point theorems [13-15, 22, 23, 35, 47, 55, 57, 66, 70, 71, 73, 82], and upper and lower solution methods [58,68,69]. These theoretical methods and tools not only enrich the scientific field of differential equations, but also give some new scientific explanations and practical applications for the corresponding natural phenomena.…”