Danyan, Gan, On the Notion of Cobordism for Bounded Manifolds, Acta Mathematica Sinica, New Series Chinese Journal of Mathematics, 10(1), 1994, pp. 59-63
The usual concept of cobordism is concerned with closed manifolds. In this paper, we generalise the concept of cobordism to the extent of bounded manifolds and obtain a homotopy theorem similar to the theorem of Thom.