Topographically Designed Analogues of [formula omitted] enkephalin

1. Hruby, V.J.
2. Gehrig, C.A.
3. Kao, L.-F.
4. Toth, G.
5. Knapp, R.
6. Lui, G.K.
7. Yamamura, H.I.
8. Kramer, T.H.
9. Davis, P.
10. Burks, T.F.