by De Maeyer, Edward, Skup, Danial, Kolli S. N. Prasad, De Maeyer-Guignard, Jaqueline, Williams, Bryan, Meacock, Peter, Sharpe, Geoff, Pioli, Dave, Hennam, John, Schuch, Wolfgang, Atherton, Keith
Published in Proceedings of the National Academy of Sciences - PNAS (15.07.1982)

by Chitnis, Sanjay N, Prasad, Kolli S. N, Bhargava, Pushpa M
Published in Journal of general microbiology (01.03.1990)