Classical Music and Opera During and after the COVID-19 PandemicSteffen Lepa, Ruth Müller-Lindenberg, Hauke Egermann · First published 2023Open the Tome
Musical Instruments in the 21st CenturyTill Bovermann, Alberto de Campo, Hauke Egermann, Sarah-Indriyati Hardjowirogo, Stefan Weinzierl · First published 2016Open the Tome
