Levi, E., & Gehring, M. Paul Hirsch and Alfred Einstein: The trials and tribulations of collaboration in exile. The impact of nazism on twentieth-century music.

Levi, Erik, and Melina Gehring. "Paul Hirsch and Alfred Einstein: The Trials and Tribulations of Collaboration in Exile." The Impact of Nazism on Twentieth-century Music .

Levi, Erik, and Melina Gehring. "Paul Hirsch and Alfred Einstein: The Trials and Tribulations of Collaboration in Exile." The Impact of Nazism on Twentieth-century Music, .