1. UGWUOWO, F. L., Mc. CLEAN, S.I. (2000), “Modeling heterogeneity in a manpower system”: a Review, App. Stoch. Models in business & Industry, 16, 99–110.
2. SIDDHENDU BISWAS and SAROJ KUMAR ADHIKARI, (1997), “Modelling and realization of a grade structure on the basis of promotion and recruitment policy”, Manpower Journal Vol. XXXII No. 4, 15–26.
3. SUBRAMANIAN, V. (1996), “Optimal promotion rate on a manpower model”, International Jour. Of Management and Systems, Vol. 12 (2).
4. VIVEKANANDA MURTY M (1996), “Some influences of markovian manpower planning models”, IJMAS, Vol. 12 (1).
5. CHANDRAS. S (1990), “Attainability of a two characteristic manpower structure”, Opsearch 27(3).