00581naa#a2200193#i#450# EN\\bibl\2696 20241213063308.5 1992-5980 20140630b2014####ek#y0engy0150####ca RUS RU Numerical solution to boundary problems for Poisson’s equation by point-source method Journal article rostov on don Don state technical University 2014 0 с. Journal article local Shcherbakova Elena Knyazev Sergey Engibaryan Alesha zh-szf.ru