Albeverio S, Lakaev SN, Rasulov TH. The Efimov effect for a model operator associated with the Hamiltonian of a non conserved number of particles. MFAT [Internet]. 2007 Mar. 25 [cited 2025 Dec. 16];13(1):1-16. Available from: https://zen.imath.kiev.ua/index.php/mfat/article/view/332