Expansion Procedures for the Euler's Equations for Rotating Fluids S. NigamK. Sinha Indiana University Mathematics Journal 1962 text pdf 10.1512/iumj.1962.11.11024 10.1512/iumj.1962.11.11024 en Indiana Univ. Math. J. 11 (1962) 383 - 402 state-of-the-art mathematics http://iumj.org/access/