Sub-riemannian metrics : minimality of abnormal geodesics versus subanalyticity
ESAIM: Control, Optimisation and Calculus of Variations, Tome 4 (1999), pp. 377-403 
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     author = {Grachev, Andrei A. and Sarychev, Andrei V.},
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     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {377--403},
     year = {1999},
     publisher = {EDP Sciences},
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     mrnumber = {1693912},
     zbl = {0978.53065},
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     url = {https://www.numdam.org/item/COCV_1999__4__377_0/}
}
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Grachev, Andrei A.; Sarychev, Andrei V. Sub-riemannian metrics : minimality of abnormal geodesics versus subanalyticity. ESAIM: Control, Optimisation and Calculus of Variations, Tome 4 (1999), pp. 377-403. https://www.numdam.org/item/COCV_1999__4__377_0/

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