K. Liagkouras and K. Metaxiotis, Application of Customer Relationship Management Systems in Business: Challenges and Opportunities. journal = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology. May 2014, vol. 90(6). 1642 - 1646 [viewed 20 September 2024]. Available from: https://publications.waset.org/pdf/9998370.