On Quasi-Conformal Functions of Several Complex Variables Sin Hitotumatu Indiana University Mathematics Journal 1959 text pdf 10.1512/iumj.1959.8.58005 10.1512/iumj.1959.8.58005 en Indiana Univ. Math. J. 8 (1959) 77 - 94 state-of-the-art mathematics http://iumj.org/access/