Optimal Routing of Customers to Two Parallel Heterogeneous Servers: The Case of IHR Service Times. - Esther Frostig; Benny Levikson (Oper. Res., 1999)

Analysis of R out of N systems with several repairmen, exponential life times and phase type repair times: An algorithmic approach. - Yonit Barron; Esther Frostig; Benny Levikson (Eur. J. Oper. Res., 2006)