@Article{ Singh_SINGH_Martínez-Puertas:369-383,

author = { Housila Singh and SARJINDER SINGH and Sergio Martínez-Puertas } ,

title = { Ratio type estimators for the median of finite populations },

journal = { Allgemeines Statistisches Archiv },

year = { 2003 },

volume = { 87 },

pages = { 369-383 },

}