Fred J. Heemstra

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Kusters, Rob J., Heemstra, Fred J., Jonker, Arjan (2009): ERP Implementation Costs: A Preliminary Investigation. In: Filipe, Joaquim, Cordeiro, José, Cardoso, Jorge (eds.) ICEIS 2007 - Enterprise Information Systems - 9th International Conference June 12-16, 2009, Funchal, Portugal. pp. 95-107.

Kusters, Rob J., Heemstra, Fred J., Jonker, Arjan (2007): Determining the costs of ERP implementation. In: Cardoso, Jorge, Cordeiro, José, Filipe, Joaquim (eds.) ICEIS 2007 - Proceedings of the Ninth International Conference on Enterprise Information Systems Volume DISI June 12-16, 2007, Funchal, Portugal. pp. 102-112.

Heemstra, Fred J., Kusters, Rob J., Man, Huibert de (2003): Guidelines for Managing Bias in Project Risk Assessment. In: ISESE 2003 - International Symposium on Empirical Software Engineering 30 September - 1 October, 2003, Rome, Italy. pp. 272-280.