In this landmark judgment from Apex Court, two sections of Article 368 of Constitution of India are struck down as being invalid and unconstitutional, as they are against the basic structure of Constitution.
Minerva Mills Ltd. & Ors Vs Union Of India & Ors on 31 July, 1980Citation : 1980 AIR 1789, 1981 SCR (1) 206
Indiankanoon.org link : https://indiankanoon.org/doc/1939993/