@inproceedings{sgem2018s07080,
  title = {ON VARIANTS OF POSITIONED ECO-GRAMMAR SYSTEMS AND FINITE LANGUAGES},
  author = {Miroslav Langer},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Informatics, Geoinformatics and Remote Sensing},
  year = {2018},
  pages = {625-632},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2018/2.1/s07.080}
}