@article{article8e45af99, title = {Topological invariants of stable immersions of oriented 3-manifolds in 'R POT. 4'}, author = {Casonatto, C. and Romero Fuster, M. C and Wik Atique, Roberta}, year = {2012}, doi = {10.1016/j.topol.2011.09.016}, journal = {Topology and its Applications} }