Nearly Kahler geometry and (2,3,5)-distributions via projective holonomy A. GoverRoberto PanaiTravis Willse Indiana University Mathematics Journal 2017 text pdf 10.1512/iumj.2017.66.6089 10.1512/iumj.2017.66.6089 en Indiana Univ. Math. J. 66 (2017) 1351 - 1416 state-of-the-art mathematics http://iumj.org/access/