1. 4Stephens, D. G., Leonard, H. W., and Silveria, M. A. "An Experimental Investigation of the Damping of Liquid Oscillations in an Oblate-Spheroidal Tank With and Without Baffles," NASA TN D-808,1963.
2. 6Stephens, D. G. and Leonard, H. W. "The Coupled Dynamic Response of a Tank Partially Filled with Liquid and Undergoing Free and Forced Planar Oscillations," NASA TN D-1945.