Shigeaki Sakurai and  Youichi Kitahata and  Ryohei Orihara,  Discovery of Sequential Patterns Based On Constraint Patterns.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2008, vol. 23(11). 3758 - 3764
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10497.