Shigemasa Takai, Ratnesh Kumar, Toshimitsu Ushio. Characterization of co-observable languages and formulas for their super/sublanguages. IEEE Trans. Automat. Contr., 50(4):434-447, 2005. [doi]
@article{TakaiKU05,
title = {Characterization of co-observable languages and formulas for their super/sublanguages},
author = {Shigemasa Takai and Ratnesh Kumar and Toshimitsu Ushio},
year = {2005},
doi = {10.1109/TAC.2005.844724},
url = {http://dx.doi.org/10.1109/TAC.2005.844724},
researchr = {https://researchr.org/publication/TakaiKU05},
cites = {0},
citedby = {0},
journal = {IEEE Trans. Automat. Contr.},
volume = {50},
number = {4},
pages = {434-447},
}