Radziuk, Darya; Andre Skirtach; Andre Geßner; Michael U. Kumke; Wei Zhang; Helmuth M€ohwald; Dmitry Shchukin (24 October 2011). "Ultrasonic Approach for Formation of Erbium Oxide Nanoparticles with Variable Geometries". Langmuir27 (23): 14472–14480. doi:10.1021/la203622u. பப்மெட்:22022886.
Radziuk, Darya; Andre Skirtach; Andre Geßner; Michael U. Kumke; Wei Zhang; Helmuth M€ohwald; Dmitry Shchukin (24 October 2011). "Ultrasonic Approach for Formation of Erbium Oxide Nanoparticles with Variable Geometries". Langmuir27 (23): 14472–14480. doi:10.1021/la203622u. பப்மெட்:22022886.