Szmytkowski R., “Closed forms of the Green's function and the generalized Green's function for the Helmholtz operator on the N–dimensional unit sphere”, Journal of Physics A–Mathematical and Theoretical, 40:5 (2007), 995–1009
Szmytkowski R., “Closed form of the generalized Green's function for the Helmholtz operator on the two-dimensional unit sphere”, Journal of Mathematical Physics, 47:6 (2006), 063506
В. М. Бабич, “О ПЦ-анзаце”, Математические вопросы теории распространения волн. 33, Зап. научн. сем. ПОМИ, 308, ПОМИ, СПб., 2004, 9–22 ; V. M. Babich, “On $PC$-ansatz”, J. Math. Sci. (N. Y.), 132:1 (2006), 2–10
Malyshev C., “A Nicholson–type integral for the product of two parabolic cylinder functions D–v(x)D–v(–x) at Rv < 0”, Integral Transforms and Special Functions, 14:2 (2003), 139–148
В. С. Булдырев, А. М. Вершик, И. А. Ибрагимов, А. М. Ильин, А. П. Киселев, Л. Д. Фаддеев, “Василий Михайлович Бабич (к семидесятилетию со дня рождения)”, УМН, 57:3(345) (2002), 181–187 ; V. S. Buldyrev, A. M. Vershik, I. A. Ibragimov, A. M. Il'in, A. P. Kiselev, L. D. Faddeev, “Vasilii Mikhailovich Babich (on his 70th birthday)”, Russian Math. Surveys, 57:3 (2002), 627–635