Gravitation and modern cosmology the cosmological constant problem - Zichichi, Antonino; De Sabbata, Venzo; Sanchez, Norma (New York Plenum Press, 1991)
' Proceedings of a symposium held in honor of Peter Gabriel Bergmann,s 75th birthday, held September 17-20, 1990, in Erice, Sicily, Italy'-- T.P. verso
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Keywords: Gravitation -- Congresses