@article{10_4153_S0008439519000134,
     author = {Geng, Pengbo and Chen, Wengu and Ge, Huanmin},
     title = {Perturbation {Analysis} of {Orthogonal} {Least} {Squares}},
     journal = {Canadian mathematical bulletin},
     pages = {780--797},
     year = {2019},
     volume = {62},
     number = {4},
     doi = {10.4153/S0008439519000134},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439519000134/}
}