An Approach to the Enumeration Problem for Non-Stable Vector Bundles I. JamesEmery Thomas Indiana University Mathematics Journal 1965 text pdf 10.1512/iumj.1965.14.14033 10.1512/iumj.1965.14.14033 en Indiana Univ. Math. J. 14 (1965) 485 - 506 state-of-the-art mathematics http://iumj.org/access/