Asymptotic Integration of Navier-Stokes Equations with Potential Forces. I Ciprian FoiasJ. Saut Indiana University Mathematics Journal 1991 text pdf 10.1512/iumj.1991.40.40015 10.1512/iumj.1991.40.40015 en Indiana Univ. Math. J. 40 (1991) 305 - 320 state-of-the-art mathematics http://iumj.org/access/