1. Auditorium acoustics and architectural design;Barron,1998
2. The caustic in the acoustics of historic interiors;Kulowski;Appl Acoust,2018
3. http://www.bl.uk/turning-the-pages/?id=cb4c06b9-02f4-49af-80ce-540836464a46&type=book, p. 8–14 [23.06.2018].
4. Caustic surfaces and irradiance for reflection and refraction from an ellipsoid, elliptic paraboloid, and elliptic cone;Shealy;Appl Opt,1973
5. Гeoмeтpичecкaя oпикa нeoднopoдныx cpeд (Kravtcov Yu. A., Orlov Yu. I.: Geometric optics of inhomogeneous media, in Russian);Кpaвцoв;Издaтeльcтвo “Hayкa”, Mocквa,1980