Starov, Aleksandr, and Sergei Kalashnikov. “A.A. ILYUSHIN S FINAL RELATION, ALTERNATIVE EQUIVALENT RELATIONS AND VERSIONS OF ITS APPROXIMATION IN PROBLEMS OF PLASTIC DEFORMATION OF PLATES AND SHELLS PART 1: A.A. ILYUSHIN S FINAL RELATION”. International Journal for Computational Civil and Structural Engineering, vol. 16, no. 1, Mar. 2020, pp. 106-29, doi:10.22337/2587-9618-2020-16-1-106-129.