Finite element approximation of a free boundary problem arising in the theory of liquid drops ans plasma physics John W. Barrett, Charles M. Elliott (1991) ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique
Flow of a dusty fluid due to wavy motion of a wall for moderately large Reynolds numbers. Ramamurthy, V., Rao, U.S. (1989) International Journal of Mathematics and Mathematical Sciences