Harzkonservierte fossile Vogelfedern aus der untersten Kreide [Resin-preserved fossil bird feathers from the lowermost Cretaceous] - 1973
Die "Schnepfenralle" Rhynchaeites messelensis Wittich 1898 ist ein Ibis (The "snipe rail" Rhynchaeites messelensis Wittich 1898 is an ibis) - 1983
The phylogenetic relationships of the early Tertiary Primoscenidae and Sylphornithidae and the sister taxon of crown group piciform birds - 2004