@ARTICLE{AbsAmoMey2014, author = "P.-A. Absil and Luca Amodei and Gilles Meyer", title = "Two {Newton} methods on the manifold of fixed-rank matrices endowed with Riemannian quotient geometries", journal = "Computational Statistics", pages = "569-590", year = 2014, volume = 29, number = "3-4", doi = "10.1007/s00180-013-0441-6", }