01039nas a2200253 i 450099100264177970753620231205133711.0011205m19929999 || | |eng 0218-2718b11687769-39ule_instPERLE004390ExLCDU 52International journal of modern physics. D :Gravitation, astrophysics, cosmologyInternational journal of modern physics. D :Gravitation, astrophysics, cosmology. - 1992-Singapore,1992-LE006 1992-2008; lac.: 1994;2000;Internat. j. modern phys. Dhttp://www.worldscientific.com/loi/ijmpdE-journal (full text available on Publisher Site from 2001 to 2008).b1168776904-07-1308-07-02991002641779707536LE0061le006-E0.00-no180000.i1191762308-07-02International journal of modern physics D793558UNISALENTOle00601-01-01sa-engxx01