Template:Massey1968
From Manifold Atlas
W. S. Massey, Higher order linking numbers, Proc. Conf. on Algebraic Topology, Univ. Illinois, Chicago Circle, Chicago, Ill., (1968) pp. 174--205. MR0254832 (40 #8039), see also MR1625365 (99e:57016) massey.pdf.
