1. il] PralldtJ. L., Tiejens, 0., App/ltd Hydro· and AU0111f-chart 1(s , Dover Pub!. New York, 1934,
2. [2]' PrandtL L "l"ber Tragflugel des Kleinsten 111- duziertcll \Viderstandes,71 Zeitshrift fur Flugtec 1l-nik unci Mntorluftschffallrt 24 Jg, ]933. (Reprinted ill TollmeilJ, Schlichting. alld Gortler, ed., Gesafll-J1)eite ALlJandJungenlSprinf,':er - Verlag, 1961,)
3. :5' \"011 Karman. T. Burger, J.M. "Gelleral Aerodynamic Tlleory - Perfect Fluid.","Vol. Jl of AuodynQrrHc ThfOiY, \\'. F. Durand, ed. Do\.'t:' I edition, 19G:L