Jain and Garg, 1983
From dinoflaj3
Jain, K.P. and Garg, R., 1983: Cleistosphaeridium mikiril Mehrotra, a junior synonym of Lingulodinium machaerophorum (Deflandre and Cookson) Wall, 1967. Journal of the Palaeontological Society of India, v.28, p.61-62.