@base . a ; "0001-7701" ; . a , ; "General relativity and gravitation" . a , , ; , , ; "General relativity and gravitation." ; ; ; ; "0001-7701" ; ; ; "0001-7701" ; ; "0001-7701" ; "General relativity and gravitation." , "General relativity and gravitation" ; ; "http://firstsearch.oclc.org" , "http://firstsearch.oclc.org/journal=0001-7701;screen=info;ECOIP" , "http://link.springer.com/journal/10714" . . a ; ; "20210207005100.0"^^ ; ; . a . "Netherlands" . a ; "0001-7701" ; . a ; .