1.
Sidorov M. Green-Rvachev’s quasi-function method for constructing two-sided approximations to positive solution of nonlinear boundary value problems. Carpathian Math. Publ. [Internet]. 2018 Dec. 31 [cited 2024 Nov. 24];10(2):360-75. Available from: https://vps.pnu.edu.ua/index.php/cmp/article/view/1496