1. Truesdell, C., Kinematics of Vorticity, Indiana University Publications, Science Series 19 (1954) 99.
2. Ram Ballabh, Proc. Ben. Math. Soc. 2 (1940) 69.
3. Lakshmana Rao, S. K., Proc. Ind. Acad. Sci. 45A (1957), 418.
4. Srivastava, A. C., Proc. Second Theo. Appl. Mech. Cong. 1956, p. 187
5. Ghildyal, C. D., Ganita 8 (1957) 1.