@article{TM_2013_280_a12,
     author = {Hermann K\"onig and Vitali Milman},
     title = {Rigidity and stability of the {Leibniz} and the chain rule},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {198--214},
     publisher = {mathdoc},
     volume = {280},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM_2013_280_a12/}
}