2024, 174 Pages, Hard cover,
Guide to the online portal, Potential Oriented Vocal Training®
Language: German
Book on demand, 2024. 152 Pages, Paperback, Fundamentals of Potential Oriented Vocal Training®
Language: German
Book on demand, 2024. 68 Pages, Paperback, Spiral binding, Practical exercise book to practice or
teach, Language: German
Presentation "Crisis Intervention for an opera singer who lost their voice", With Marlene Klassen, Live Recording from the BDG Kongress April 30, 2022
Language:
German
Dissertation by Dr. Teresa Boning, Language: German
2018, Publisher: Peter Ewers,
Language: English
2020, Publisher: Peter
Ewers,
Language: German