Reference:

Georgina Bumpus, Christoph Haase, Stefan Kiefer, Paul-Ioan Stoienescu, and Jonathan Tanner. On the size of finite rational matrix semigroups. In Artur Czumaj, Anuj Dawar, and Emanuela Merelli, editors, 47th International Colloquium on Automata, Languages, and Programming, ICALP 2020, July 8-11, 2020, Saarbrücken, Germany (Virtual Conference), volume 168 of LIPIcs, pages 115:1–115:13. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2020.

Suggested BibTeX entry:

@inproceedings{20BHKST-ICALP,
    author = {Georgina Bumpus and Christoph Haase and Stefan Kiefer and Paul-Ioan Stoienescu and Jonathan Tanner},
    booktitle = {47th International Colloquium on Automata, Languages, and Programming, {ICALP} 2020, July 8-11, 2020, Saarbr{\"{u}}cken, Germany (Virtual Conference)},
    editor = {Artur Czumaj and Anuj Dawar and Emanuela Merelli},
    pages = {115:1--115:13},
    publisher = {Schloss Dagstuhl - Leibniz-Zentrum f{\"{u}}r Informatik},
    series = {LIPIcs},
    title = {On the Size of Finite Rational Matrix Semigroups},
    volume = {168},
    year = {2020}
}