Starov, A., & Kalashnikov, S. (2020). 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, 16(1), 106–129. https://doi.org/10.22337/2587-9618-2020-16-1-106-129