@article{SAD_1988__13_1_8_0,
     author = {Critchley, Frank},
     title = {Principal component analysis : some majorisation, perturbation and nonnegative matrix theory},
     journal = {Statistique et analyse des donn\'ees},
     pages = {8--14},
     publisher = {Association pour la statistique et ses illustrations},
     volume = {13},
     number = {1},
     year = {1988},
     mrnumber = {984842},
     language = {en},
     url = {http://www.numdam.org/item/SAD_1988__13_1_8_0/}
}