The Intersection Product of Transverse Invariant Measures S. HurderY. Mitsumatsu Indiana University Mathematics Journal 1991 text pdf 10.1512/iumj.1991.40.40051 10.1512/iumj.1991.40.40051 en Indiana Univ. Math. J. 40 (1991) 1169 - 1183 state-of-the-art mathematics http://iumj.org/access/