New Delhi: Congress president Sonia Gandhi has written letter to Delhi Chief Minister Sheila Dikshit asking for strict punishment for the guilty in the Delhi gang-rape case.Here is the full text of the letter:PromotedListen to the latest songs, only on JioSaavn.comAlso Read6,000 Delhi Students To Take IQ Tests For Special Learning ProgrammeWoman Jumps Before Moving Metro At Delhi Station, Loses Right HandWoman Doctor Allegedly Assaulted By Patient's Relatives In Delhi Hospital