Jong-Shi Pang, Daniel Ralph. Piecewise Smoothness, Local Invertibility, and Parametric Analysis of Normal Maps. Math. Oper. Res., 21(2):401-426, 1996. [doi]
@article{PangR96,
title = {Piecewise Smoothness, Local Invertibility, and Parametric Analysis of Normal Maps},
author = {Jong-Shi Pang and Daniel Ralph},
year = {1996},
doi = {10.1287/moor.21.2.401},
url = {http://dx.doi.org/10.1287/moor.21.2.401},
researchr = {https://researchr.org/publication/PangR96},
cites = {0},
citedby = {0},
journal = {Math. Oper. Res.},
volume = {21},
number = {2},
pages = {401-426},
}