Petrology and geochemistry of the ultrapotassic alkaline intrusives from the Damodar valley, eastern Indian shield necessitate revision in the IUGS classification of mafic ultrapotassic alkaline rocks - Srivastava, R.K.; Chalapathi Rao, N.V.; Sinha, A.K.; Bharati, R.L. (International Kimberlite Conference: Extended Abstracts, 2008)