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 ReadDelhi Pollution: Physical Classes Suspended In Schools, Except For Class 10 And 12Infant Kidnapped From Delhi Hospital Rescued From UP Rail Station, 2 ArrestedSchools Go Online, No Entry For Trucks As Delhi Air Pollution Worsens