@article{AbsMal2012, author = {P.-A. Absil and J\'{e}r\^{o}me Malick}, title = {Projection-like Retractions on Matrix Manifolds}, publisher = {SIAM}, year = {2012}, journal = {SIAM Journal on Optimization}, volume = {22}, number = {1}, pages = {135-158}, url = {http://link.aip.org/link/?SJE/22/135/1}, doi = {10.1137/100802529} }