@article{KYB_1979__15_5_a0,
     author = {Kovanic, Pavel},
     title = {On the pseudoinverse of a sum of symmetric matrices with applications to estimation},
     journal = {Kybernetika},
     pages = {--348},
     publisher = {mathdoc},
     volume = {15},
     number = {5},
     year = {1979},
     mrnumber = {554017},
     zbl = {0419.15004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1979__15_5_a0/}
}