• [1] J. Kelly, General Topology, Van Nostrand Co., Inc., Princeton, N.J., 1965.
• [2] Serge Lang, Introduction to differentiable manifolds, Interscience Publishers (a division of John Wiley & Sons, Inc.), New York-London, 1962. MR 0155257 (27 #5192)
• [3] R. Thom, Local topological properties of differentiable mappings, Differential Analysis, Bombay Colloq., Oxford Univ. Press, London, 1964, pp. 191–202. MR 0195102 (33 #3307)
• [4] R. Thom, Ensembles et morphismes stratifiés, Bull. Amer. Math. Soc. 75 (1969), 240–284 (French). MR 0239613 (39 #970), http://dx.doi.org/10.1090/S0002-9904-1969-12138-5
• [5] Hassler Whitney, Tangents to an analytic variety, Ann. of Math. (2) 81 (1965), 496–549. MR 0192520 (33 #745)
• [6] H. Whitney, Local properties of analytic varieties, Differential and Combinatorial Topology, Princeton Univ. Press, Princeton, 1965.

References

[1]

J. Kelly, General Topology, Van Nostrand Co., Inc., Princeton, N.J., 1965.

[2]

S. Lang, Introduction to differentiable manifolds, Interscience, New York, 1962. MR 0155257 (27:5192)

[3]

R. Thom, Local topological properties of differentiable mappings, ``Colloquium on Differential Analysis''. pp. 191-202, Tata Inst./Oxford Univ. Press, Bombay/London and New York, 1964. MR 0195102 (33:3307)

[4]

R. Thom, Ensembles et morphismes stratifiés, Bull. Amer. Math. Soc. 75 (1969), 240-284. MR 0239613 (39:970)

[5]

H. Whitney, Tangents to an analytic variety, Ann, of Math. 81 (1964), 496-549. MR 0192520 (33:745)

[6]

H. Whitney, Local properties of analytic varieties, Differential and Combinatorial Topology, Princeton Univ. Press, Princeton, 1965.