The molluscicidal activity of coumarins from Ethulia conyzoides and of dicumarol. - Kady ,M.M,.; Brimer ,L,.; Furu ,P,.; Lemmich ,E,.; Nielsen ,H.M,.; Thiilborg ,S.T,.; Thastrup ,O,.; Christensen ,S.B.. (Planta Medica, 1992)