Comparative biological activites of 'alfa'-MSH antagonists in vertebrate pigment cells - Castrucci, Ana Maria de Lauro; Almeida, Ana Luisa K; Al-Obeidi, Fahad A; Hadley, Mac E; Hruby, Victor J; Staples, Douglas J; Sawyer, Tomi K (General and Comparative Endocrinology, 1997)