J. Ackeret, F. Feldmann, and N. Rott.
Investigations of compression shocks and boundary layers in gases
moving at high speed.
Technical Report NACA Tech. Memo. 1113, ETH Zurich No. 10, 1947.
L. Prandtl.
Über Flüssigkeitsbewegung bei sehr kleiner Reibung.
In Ludwig Prandtl gesammelte Abhandlüngen, volume 2,
pages 575-584. Springer-Verlag, Berlin, 1961.
L. L. Van Dommelen and S. J. Cowley.
On the Lagrangian description of unsteady boundary-layer
separation. Part 1. General theory.
J. Fluid Mech., 210: 593-626, 1990.
L. L. Van Dommelen and S. F. Shen.
The genesis of separation.
In T. Cebeci, editor, Symposium on Numerical and Physical
Aspects of Aerodynamic Flows, pages 293-311. Springer-Verlag, 1982.