Shtefan, T.A. and Velichko, H.V. 2013. Research the potential energy of forming a rectangular plate, which pushes convex stamp. Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics. 1081 (Dec. 2013), 45-53. DOI:https://doi.org/10.26565/2221-5646-2013-1081-05.