@article{articlefee97d75,
title   = {On the Betti number of the union of two generic map images},
author = {Biasi, Carlos and Libardi, Alice Kimie Miwa and Saeki, Osamu},
year = {1999},
doi = {10.1016/s0166-8641(97)00273-3},
journal   = {Topology and its Applications}
}