Dufourea (Cephalictoides) paradoxa Morawitz, 1867
- Bieri, S. 2002. Die Bienen und Wespen des Fürstentums Liechtenstein. Amtlicher Lehrmittelverlag.
- Bossert, S. 2014. The high alpine bee fauna (Hymenoptera: Apoidea) of the Zillertal Alps, Austria. Biodivers Data J. 2014; (2): e1115.
- Müller, A. 2018. Pollen host selection by predominantly Alpine bee species of the genera Andrena, Panurginus, Dufourea, Megachile, Hoplitis and Osmia (Hymenoptera, Apoidea). Alpine Entomology 2, 101-113.
- Nieto, A., Roberts, S.P.M., Kemp, J., Rasmont, P., Kuhlmann, M., García Criado, M., Biesmeijer, J.C., Bogusch, P., Dathe, H.H., De la Rúa, P., De Meulemeester, T., Dehon, M., Dewulf, A., Ortiz-Sánchez, F.J., Lhomme, P., Pauly, A., Potts, S.G., Praz, C., Quaranta, M., Radchenko, V.G., Scheuchl, E., Smit, J., Straka, J., Terzo, M., Tomozii, B., Window, J. and Michez, D. 2014. European Red List of bees. Luxembourg: Publication Office of the European Union.
- Westrich, P. 1990. Die Wildbienen Baden-Württembergs. Verlag Eugen Ulmer, Stuttgart, Allgemeiner Teil, pp.1-431; Spezieller Teil, pp.432-972.
- Westrich, P. 2018. Die Wildbienen Deutschlands. Verlag Eugen Ulmer, Stuttgart, 821pp.