1. Kipriyanov, I.A., Fourier-Bessel Transform and Embedding Theorems for Weight Classes, Tr. Math. Inst. Steklova, 1967, vol. 89, no. 2, pp. 130–213.
2. Kipriyanov, I.A., Singulyarnye ellipticheskie kraevye zadachi (Singular Elliptic Boundary Value Problems), Moscow: Nauka, 1997.
3. Kipriyanov, I.A. and Lyakhov, L.N., On a Class of Pseudodifferential Operators, Dokl. Akad. Nauk SSSR, 1974, vol. 218, no. 2, pp. 269–280.
4. Kohn, J.J. and Nirenberg, L., An Algebra of Pseudo-Differential Operators, Comm. Pure Appl. Math., 1965, vol. 18, no. 1–2, pp. 269–305.
5. Hörmander, L., Pseudo-Differential Operators, Comm. Pure Appl. Math., 1965, no. 18, pp. 501–517.