@Article{ Martínez-Puertas_Illescas_MARTINEZ_ARCOS,

author = { Sergio Martínez-Puertas and María Illescas Manzano and HELENA MARTINEZ PUERTAS and ANTONIO ARCOS CEBRIAN } ,

title = { Calibration estimator for Head Count Index },

journal = { International Journal of Computer Mathematics },

year = { 2020 },

volume = { 97 },

pages = { - },

}