Life-expectancy in a nonhomogeneous population. - Gregory M. Wajiga; Olatunde A. Adekola (J. Oper. Res. Soc., 1998)

A note on life expectancy in a nonhomogeneous population. - Olatunde A. Adekola (J. Oper. Res. Soc., 2001)

A generalised life-expectancy model for a population. - Olatunde A. Adekola (J. Oper. Res. Soc., 2002)