Citation: Ds. Peters, The situation of avian systematics - progress and immanent obstacles (vol 141, pg 263, 2000), J ORNITHOL, 141(4), 2000, pp. 508-508
Citation: G. Mayr et Ds. Peters, On the systematic position of the Middle Eocene swift Aegialornis szarskiiPeters 1985 with description of a new swift-like bird from Messel (Aves, Apodiformes), N J GEO P-M, (5), 1999, pp. 312-320