1. Gordon, J.W. and Ruddle, F.H. (1981) Science 214, 1244–1246. la Wagner, T.E., Hoppe, P.C., Jollick, J.D., Scholl, D.R.
2. Hodinka, R.L. and Gault, J.B. (1981) Proc. Nat. Acad. Sci.U.S.A. 78, 6376–6380.
3. Gordon, J.W., Scangos, G.A., Plotkin, D.J., Barbosa, J.A. and Ruddle, F.H. (1980) Proc. Nat. Acad. Sci. U.S.A. 77, 7380–7384.
4. Wagner, E.F., Stewart, T.A. and Mintz, B. (1981) Proc. Nat. Acad. Sci. U.S.A. 78, 5016–5020.
5. Costantini, F. and Lacy, E. (1981) Nature 294, 92–94.