@article{KYB_1990__26_1_a4,
     author = {Deniau, Claude and Oppenheim, Georges and Viano, Marie-Claude},
     title = {Estimation of a centrality parameter and random sampling time. {I.} {Necessary} conditions for optimality},
     journal = {Kybernetika},
     pages = {67--78},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {1990},
     mrnumber = {1042232},
     zbl = {0719.62097},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1990__26_1_a4/}
}