Head co-ossification, phragmosis and defence in the casque-headed tree frog Corythomantis greeningi - Jared, Carlos; Antoniazzi, Marta Maria; Navas, Carlos; Katchburian, Eduardo; Haapalainen, Edna; Tambourgi, Denise Vilarinho; Rodrigues, Miguel Trefaut (Journal of Zoology, 2005)