3 citations to https://www.mathnet.ru/rus/tmf4811

1. F. Gesztesy, W. Karwowski, Z. Zhao, “Limits of soliton solutions”, Duke Math. J., 68:1 (1992)  
2. E. Lubenets, “Upper estimates of underbarrier penetration in potential scattering”, Nuov Cim B, 105:3 (1990), 315  
3. E. Lubenets, “On one approach to defining the quasi-stationary-state energy in potential scattering”, Nuov Cim B, 105:3 (1990), 285