@article{fcds06,
   author = {S. Prinke and M. Wojciechowski and M. Zakrzewicz},
   title = {Pruning Discovered Sequential Patterns Using Minimum Improvement Threshold},
   journal = {Foundations of Computing and Decision Sciences},
   publisher = {Publishing House of Poznan University of Technology},
   issn = "0867-6356"
   year = 2006,
   volume = 31,
   number = 1,
   pages = "43--57",
}