@article{CRMATH_2003__337_3_219_0,
     author = {Assi N'Guessan},
     title = {Constrained covariance matrix estimation in road accident modelling with {Schur} complements},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {219--222},
     publisher = {Elsevier},
     volume = {337},
     number = {3},
     year = {2003},
     doi = {10.1016/S1631-073X(03)00309-1},
     language = {en},
}