@article{MET_1969__14_175399,
     author = {G. Derflinger},
     title = {Efficient methods for obtaining the minres and maximum-likelihood {Solutions} in factor analysis},
     journal = {Metrika},
     pages = {214--231},
     year = {1969},
     volume = {14},
     url = {http://geodesic.mathdoc.fr/item/MET_1969__14_175399/}
}