@article{RCP25_1978__26__45_0,
     author = {Kl\'eman, Maurice and Michel, Louise},
     title = {Spontaneous {Breaking} of {Euclidean} {Invariance} and {Classification} of {Topologically} {Stable} {Defects} and {Configurations} of {Crystals} and {Liquid} {Crystals}},
     journal = {Les rencontres physiciens-math\'ematiciens de Strasbourg -RCP25},
     note = {talk:4},
     pages = {45--48},
     publisher = {Institut de Recherche Math\'ematique Avanc\'ee - Universit\'e Louis Pasteur},
     volume = {26},
     year = {1978},
     language = {en},
     url = {http://archive.numdam.org/item/RCP25_1978__26__45_0/}
}