1. Adler, R., Bazin, M., Schiffer, M.: Introduction to General Relativity, 2nd edn. McGraw-Hill, New York (1975)
2. Albrow, M.G.: Nature 241, 56 (1973)
3. Banerjee, N., Sen, S.: Pramana J. Phys. 49, 609 (1997)
4. Berman, M.S.: M.Sc. thesis, Instituto Tecnológico de Aeronáutica, São José dos Campos, Brazil. Available online, through the federal government site www.sophia.bibl.ita.br/biblioteca/index.html (supply author’s surname and keyword may be “pseudotensor” or “Einstein” (1981, unpublished)
5. Berman, M.S.: In: Kreitler, P.V. (ed.) Trends in Black Hole Research. Nova Science, New York (2006), Chap. 5