@Article{ Vio21, author = { Violo, Ivan Yuri }, title = { A remark on two notions of flatness for sets in the Euclidean space }, journal = { J. Reine Angew. Math. }, year = { 2021 }, pages = { }, URL = { http://cvgmt.sns.it/paper/5051/ }, note = { cvgmt preprint} }