Thomas Ang, Janusz A. Brzozowski. Languages Convex with Respect to Binary Relations, and Their Closure Properties. Acta Cybern., 19(2):445-464, 2009. [doi]
@article{AngB09,
title = {Languages Convex with Respect to Binary Relations, and Their Closure Properties},
author = {Thomas Ang and Janusz A. Brzozowski},
year = {2009},
url = {http://www.inf.u-szeged.hu/actacybernetica/edb/vol19n2/Ang_2009_ActaCybernetica.xml},
researchr = {https://researchr.org/publication/AngB09},
cites = {0},
citedby = {0},
journal = {Acta Cybern.},
volume = {19},
number = {2},
pages = {445-464},
}