1. R.L. Maltby: AGARDograph 70, April 1962
2. W. Merzkirch: Flow visualization. Academic Press, New York (1974)
3. W. Merzkirch: Flow visualization 2. Hemisphere Publ. Corp.,Wash. (1982)
4. W.J. Yang: Flow Visualization 3, Hemisphere Publ. Corp., Wash. (1985)
5. S.J. Kline, P.W. Runstadler: Trans. ASME, J. Appl. Mech. 26 (1959) 166