1. Erdélyi A.: The Bateman Manuscript Project. Higher Transcendental Functions. Volume I. McGraw-Hill, New York (1953)
2. Bros J., Epstein H., Moschella U.: Lifetime of a massive particle in a de Sitter universe. JCAP 0802, 003 (2008)
3. Bros, J., Epstein, H., Moschella, U.: Particle decays and stability on the de Sitter universe. http://arxiv.org/abs/0812.3513v2[hep-th] , 2008
4. Nachtmann O.: Dynamische Stabilität im de-Sitter-raum. Osterr. Akad. Wiss., Math.-Naturw. Kl., Abt. II 176, 363–379 (1968)
5. Boyanovsky D., Holman R., Prem Kumar S.: Inflaton decay in De Sitter spacetime. Phys. Rev. D56, 1958–1972 (1997)