@article{SLC_1989_22_a14,
     author = {Norbert Spangenberg and Karl Erich Wolff},
     title = {Comparison between {Principal} {Component} {Analysis} and {Formal} {Concept} {Analysis} of {Repertory} {Grids}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {22},
     year = {1989},
     url = {http://geodesic.mathdoc.fr/item/SLC_1989_22_a14/}
}