Hossenfelder, Sabine; Schwarz, Dominik J.; Greiner, Walter (2003). Particle production in time-dependent gravitational fields: the expanding mass shell20 (11). Classical and Quantum Gravity. p. 2337. Bibcode:2003CQGra..20.2337H. ISSN0264-9381. doi:10.1088/0264-9381/20/11/325.
Hossenfelder, Sabine; Schwarz, Dominik J.; Greiner, Walter (2003). Particle production in time-dependent gravitational fields: the expanding mass shell20 (11). Classical and Quantum Gravity. p. 2337. Bibcode:2003CQGra..20.2337H. ISSN0264-9381. doi:10.1088/0264-9381/20/11/325.
Hossenfelder, Sabine; Schwarz, Dominik J.; Greiner, Walter (2003). Particle production in time-dependent gravitational fields: the expanding mass shell20 (11). Classical and Quantum Gravity. p. 2337. Bibcode:2003CQGra..20.2337H. ISSN0264-9381. doi:10.1088/0264-9381/20/11/325.
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«Review of Lost in Math»(en inglés). Kirkus Reviews. abril de 2018. Consultado el 26 de diciembre de 2018.