Annette Lykknes, Brigitte Van Tiggelen: Ida and Walter Noddack Through Better and Worse:
An Arbeitsgemeinschaft in Chemistry. In: Annette Lykknes, Brigitte Van Tiggelen, Donald L. Opitz (Hrsg.): For Better or For Worse? Collaborative Couples in the Sciences (= Science Networks). Band44. Springer Science & Business Media, 2012, ISBN 978-3-0348-0286-4, S.113 (google.se [abgerufen am 8. April 2022]): „One of Noddack's close collaborators, Ludwig Holleck (1904-?) was a declared militant Nazi, and he lost his appointment in Vienna in 1934 owing to his political opinions.“
