@article{MET_1978__25_175729,
     author = {M.P. Singh and R. Platek},
     title = {A {Strategy} for {Up-Dating} {Continuous} {Surveys.}},
     journal = {Metrika},
     pages = {1--8},
     publisher = {mathdoc},
     volume = {25},
     year = {1978},
     url = {http://geodesic.mathdoc.fr/item/MET_1978__25_175729/}
}