@inproceedings{sgem2017s07066,
  title = {ON HIERARCHY OF THE POSITIONED ECO-GRAMMAR SYSTEMS WITH GIVEN NUMBERS OF AGENTS},
  author = {Miroslav Langer and Alica Kelemenova},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Informatics, Geoinformatics and Remote Sensing},
  year = {2017},
  pages = {517-524},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2017/21/s07.066}
}