Title: A Penalty and Extrapolation Method for
the Stationary Stokes Equations

Author: Richard S. Falk and J. Thomas King

Source: SIAM J. Numer. Anal., Vol 13, No 5, October 1976, 814-829.

Abstract: A penalty-extrapolation procedure is analyzed for avoiding the
problem of the construction of trial functions satisfying div v = 0
and v=0 on the boundary in the approximation of the stationary Stokes
equations.

URL: http://www.math.rutgers.edu/~falk/papers/stokes-p-e2.pdf