@article{10_1017_S0017089500032328,
     author = {Ballesteros, J. J. Nu\~no and Saia, M. J.},
     title = {Multiplicity of {Boardman} strata and deformations of map germs},
     journal = {Glasgow mathematical journal},
     pages = {21--32},
     year = {1998},
     volume = {40},
     number = {1},
     doi = {10.1017/S0017089500032328},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500032328/}
}