. "1"^^ . "IUCAA" . "Griffiths, Jerry" . "Impulsive waves in de Sitter and anti-de Sitter space-times"@en . "Impulsive waves in de Sitter and anti-de Sitter space-times" . "2"^^ . "23;23" . . . . . "769634" . . "Impulsive waves in de Sitter and anti-de Sitter space-times"@en . . "Impulsive waves in de Sitter and anti-de Sitter space-times" . "Abstracts of Plenary Lectures and Contributed Papers of the" . "[199AD2143999]" . "RIV:J13/98:113200613!RIV/1998/MSM/MSM8MD0" . "Podolsk\u00FD, Ji\u0159\u00ED" . "Pune (India)" . . . "RIV:J13/98:113200613" . "11320" . "0"^^ .