Phương tiện liên quan tới Coraciiformes tại Wikimedia Commons
Johansson Ulf S. & Ericson Per G. P. (2003): Molecular support for a sister group relationship between Pici and Galbulae (Piciformes sensu Wetmore 1960). Journal of Avian Biology, 34(2): 185–197. doi:10.1034/j.1600-048X.2003.03103.xToàn văn PDF
Mayr Gerald & Mourer-Chauviré Cécile (2000): Rollers (Aves: Coraciiformes. s. s.) from the Middle Eocene of Messel (Germany) and the Upper Eocene of the Quercy (France). Society of Vertebrate Paleontology, 20(3): 533–546. DOI:10.1671/0272-4634(2000)020[0533:RACSSF]2.0.CO;2 Toàn văn PDF
Terres John K. (1980). The Audubon Society Encyclopedia of North American Birds. ISBN 0-394-46651-9
