Joris, Henri2008-12-122008-12-122008-12-12198210.1007/BF01899535https://infoscience.epfl.ch/handle/20.500.14299/32660universal property of immersionsNeil parabolaUne $C^\infty$-application non-immersive qui possède la propriété universelle des immersionstext::journal::journal article::research article