Relaxant Effects of the Essential Oil of Eucalyptus tereticornis and its Main Constituent 1,8-Cineole on Guinea-Pig Tracheal Smooth Muscle - Coelho-de-Souza, Lívia Noronha; Leal-Cardoso, José Henrique; de Abreu Matos, Francisco José; Lahlou, Saad; Magalhães, Pedro Jorge Caldas (Planta Medica, 2005)