1. Gonor, A. L. 1958 Izv. Akad. Nauk, OTN, no. 7.
2. Van Dyke, M. D. 1962 J. Fluid Mech. 14,161.
3. Kopal, Z. 1949 Mass. Inst. Tech. Dep. Elect. Engng Tech. Rep. 5.
4. Bulakh, B. M. 1962a Prek. Mat. Mek. 26,430.
5. Holt, M. 1954 Quart. J. Mech. 8,438.