Gabrilove, J. L.; Welte, K.; Harris, P.; Platzer, E.; Lu, L.; Levi, E.; Mertelsmann, R.; Moore, M. A. Proceedings of the National Academy of Sciences of the United States of America (1986)
Welte, K.; Platzer, E.; Lu, L.; Gabrilove, J. L.; Levi, E.; Mertelsmann, R.; Moore, M. A. S. Proceedings of the National Academy of Sciences of the United States of America (1985)
