Hans Wilhelm Alt, Gianni Gilardi (1982)

Annali della Scuola Normale Superiore di Pisa - Classe di Scienze

Jackson, Neal (2007)

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Zdeněk Kopal (1938)

Časopis pro pěstování matematiky a fysiky

Turyshev, Slava G., Toth, Viktor T. (2010)

Living Reviews in Relativity [electronic only]

Daniel B. Henry (1991)

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Wald, Robert M. (2001)

Living Reviews in Relativity [electronic only]

G. M. Kremer, Ingo Müller (1998)

Annales de l'I.H.P. Physique théorique

K. Kalousová, O. Souček, O. Čadek (2012)

Acta Universitatis Carolinae. Mathematica et Physica