Meaningfulness and the Erlanger program of Felix Klein
Mathématiques informatique et sciences humaines, Tome 101 (1988), pp. 61-71.
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     author = {Narens, L.},
     title = {Meaningfulness and the {Erlanger} program of {Felix} {Klein}},
     journal = {Math\'ematiques informatique et sciences humaines},
     pages = {61--71},
     publisher = {Ecole des hautes-\'etudes en sciences sociales},
     volume = {101},
     year = {1988},
     mrnumber = {954945},
     zbl = {0672.03003},
     language = {en},
     url = {http://archive.numdam.org/item/MSH_1988__101__61_0/}
}
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Narens, L. Meaningfulness and the Erlanger program of Felix Klein. Mathématiques informatique et sciences humaines, Tome 101 (1988), pp. 61-71. http://archive.numdam.org/item/MSH_1988__101__61_0/

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