Representability of Milnor's functor k_{PL} Robert West Indiana University Mathematics Journal 1968 text pdf 10.1512/iumj.1968.17.17016 10.1512/iumj.1968.17.17016 en Indiana Univ. Math. J. 17 (1968) 299 - 314 state-of-the-art mathematics http://iumj.org/access/