@article{PMIHES_1969__36__127_0,
     author = {Heisuke Hironaka},
     title = {Normal cones in analytic {Whitney} stratifications},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {127--138},
     year = {1969},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {36},
     doi = {10.1007/BF02684601},
     mrnumber = {277759},
     zbl = {0219.57022},
     language = {en},
     url = {https://pmihes.centre-mersenne.org/articles/10.1007/BF02684601/}
}