2 citations to https://www.mathnet.ru/rus/tm729

1. Boiti M., Bruschi M., Pempinelli F., Prinari B., “A discrete Schrodinger spectral problem and associated evolution equations”, Journal of Physics A–Mathematical and General, 36:1 (2003), 139–149              
2. Boiti M., Pempinelli F., Prinari B., Spire A., “An integrable discretization of KdV at large times”, Inverse Problems, 17:3 (2001), 515–526