Gusynin, Viacheslav, Andrii Gusynin, and Helen Tachinina. 2017. “ESTIMATE OF ACCURACY OF APPROXIMATE SOLUTIONS OF NON-LINEAR BOUNDARY VALUE PROBLEMS BY THE MULTI-STEP DIFFERENTIAL TRANSFORM METHOD”. Proceedings of National Aviation University 70 (1):48-54. https://doi.org/10.18372/2306-1472.70.11422.