@article{MSH_1980__71__39_0,
     author = {Jumarie, Guy},
     title = {Relativistic fuzzy sets. {Toward} a new approach to subjectivity in human systems},
     journal = {Math\'ematiques et sciences humaines},
     pages = {39--75},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {71},
     year = {1980},
     mrnumber = {589668},
     zbl = {0443.94043},
     language = {en},
     url = {http://www.numdam.org/item/MSH_1980__71__39_0/}
}