no. 2
A sufficient condition for Ω-stability of vector fields on open manifolds
Compositio Mathematica, Tome 65 (1988) no. 2, pp. 171-176. 
@article{CM_1988__65_2_171_0,
     author = {Kotus, Janina and Klok, Fopke},
     title = {A sufficient condition for $\Omega $-stability of vector fields on open manifolds},
     journal = {Compositio Mathematica},
     pages = {171--176},
     publisher = {Kluwer Academic Publishers},
     volume = {65},
     number = {2},
     year = {1988},
     mrnumber = {932642},
     zbl = {0659.58030},
     language = {en},
     url = {archive.numdam.org/item/CM_1988__65_2_171_0/}
}
Kotus, Janina; Klok, Fopke. A sufficient condition for $\Omega $-stability of vector fields on open manifolds. Compositio Mathematica, Tome 65 (1988) no. 2, pp. 171-176. http://archive.numdam.org/item/CM_1988__65_2_171_0/

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