On the Betti Number of the Image of a Codimension-k Immersion with Normal Crossings
Carlos Biasi, Osamu Saeki · Proceedings of the American Mathematical Society · 1995
Carlos Biasi, Osamu Saeki, On the Betti Number of the Image of a Codimension-k Immersion with Normal Crossings, Proceedings of the American Mathematical Society, Vol. 123, No. 11 (Nov., 1995), pp. 3549-3554