Birgebayev, A., and M. Muratbekov. 2022. “SMOOTHNESS OF SOLUTIONS (SEPARABILITY) OF THE NONLINEAR STATIONARY SCHR¨ODINGER EQUATION”. Journal of Mathematics, Mechanics and Computer Science 115 (3):25-35. https://doi.org/10.26577/JMMCS.2022.v115.i3.03.