Stability of the Burgers Shock Wave and the Korteweg-de Vries Soliton Alan JefferyTsunehiko Kakutani Indiana University Mathematics Journal 1971 text pdf 10.1512/iumj.1971.20.20039 10.1512/iumj.1971.20.20039 en Indiana Univ. Math. J. 20 (1971) 463 - 468 state-of-the-art mathematics http://iumj.org/access/