Тарасьев А, Tarasyev A, Усова А, Usova A. An estimate of a smooth approximation of the production function for integrating Hamiltonian systems. mgta [Internet]. 30Mar.2020 [cited 14May2025];12(1):91-5. Available from: http://mgta.krc.karelia.ru/ojs/index.php/mgta/article/view/12