1. Anon, 2012. Romberg׳s Method. Wikipedia. 〈www.wikipedia.org/wiki.Rombergs%27s_method〉 (accessed 26.08.12.).
2. Inventory Control;Axsäter,2000
3. Identifiability of the multinormal and other distributions under competing risks model;Basu;J. Multivar. Anal.,1978
4. Time Series Analysis: Forecasting and Control;Box,1976
5. Matching Supply with Demand: An Introduction to Operations Management;Cachon,2006