2 citations to https://www.mathnet.ru/eng/aft3

1. S. Yu. Orevkov, “Diffusion orthogonal polynomials in 3-dimensional domains bounded by developable surfaces”, J. Geom. Phys., 191 (2023), 104882    
2. S. Yu. Orevkov, “Two-dimensional diffusion orthogonal polynomials ordered by a weighted degree”, Funct. Anal. Appl., 57:3 (2023), 208–235