@article{CC_2003_32_3_a7,
     author = {Ioffe, Alexander D.},
     title = {On robustness of the regularity property of maps},
     journal = {Control and Cybernetics},
     pages = {543--554},
     publisher = {mathdoc},
     volume = {32},
     number = {3},
     year = {2003},
     zbl = {1127.49023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2003_32_3_a7/}
}