Kinnaird, Margaret F.; Hadiprakarsa, Yok-Yok; Thiensongrusamee, Preeda (2003). "Aerial jousting by Helmeted Hornbills Rhinoplax vigil: observations from Indonesia and Thailand". Ibis145 (3): 506–508. doi:10.1046/j.1474-919X.2003.00188.x.
Cranbrook, Earl of; Kemp, A. (1995). "Aerial casque-butting by hornbills (Bucerotidae): a correction and an expansion". Ibis137 (4): 588–589. doi:10.1111/j.1474-919X.1995.tb03271.x.
Martin, Graham; Coetzee, Hendri C. (2003). "Visual fields in hornbills: precision-grasping and sunshades". Ibis146 (1): 18–26. doi:10.1111/j.1474-919X.2004.00211.x.
Holbrook, Kimberley; Smith, Thomas B.; Hardesty, Britta D. (2002). "Implications of long-distance movements of frugivorous rain forest hornbills". Ecography25 (6): 745–749. doi:10.1034/j.1600-0587.2002.250610.x.
Kalina, Jan (1988). "Nest intruders, nest defence and foraging behaviour in the Black-and-white Casqued Hornbill Bycanistes subcylindricus". Ibis131 (4): 567–571. doi:10.1111/j.1474-919X.1989.tb04791.x.
Gaietti, Mauro; McConkey, Kim (1998). "Black Hornbill Abthracoceros malayanus following Gibbons in central Borneo". Ibis140 (4): 686–687. doi:10.1111/j.1474-919X.1998.tb04716.x.