Erwin Schrödinger and the Rise of Wave Mechanics. Part 1 Schrödinger in Vienna and Zurich 1887–1925. (Springer, 2001) ISBN 0-387-95179-2 Jammer, Max The
Paths Of Heaven: The Evolution Of Airpower Theory: The School Of Advanced Airpower Studies. Lancer Publishers. 2000: 8. ISBN 978-81-7062-282-6. Muzaffar