The families contained are often treated within a broader concept of the superfamily Sylvioidea (syn. Sylviida), together with several other related families.
↑Fjeldså, Jon; Christidis, Les; Ericson, Per G. P. (2020). The largest avian radiation: the evolution of perching birds, or the order Passeriformes. Barcelona: Lynx edicions. pp.203–209. ISBN978-84-16728-33-6.