@article{CSIS_2019_16_2_a7,
     author = {Piotr Lasek and Jarek Gryz},
     title = {Density-Based {Clustering} with {Constraints}},
     journal = {Computer Science and Information Systems},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {2019},
     url = {http://geodesic.mathdoc.fr/item/CSIS_2019_16_2_a7/}
}