KATHMANDU: Former presidents and general secretaries of the Nepal Students’ Union today paid heartfelt tributes to former prime minister and former Nepali Congress president late Girija Prasad Koirala on the 13th day of his death. Incumbent Central Working Committee of NSU also expressed its solidarity to honour their late leader. Issuing a press release on behalf of former student leaders, NC CA member Nabindra Raj Joshi said, “The unity and consensus among the political parties to take peace process to the logical conclusion will the right tribute to Koirala.”