Raymond R. Devillers, Hanna Klaudel, Elisabeth Pelz. An Algebraic Box Calculus. Journal of Automata, Languages and Combinatorics, 5(2):81-108, 2000.
@article{DevillersKP00, title = {An Algebraic Box Calculus}, author = {Raymond R. Devillers and Hanna Klaudel and Elisabeth Pelz}, year = {2000}, tags = { algebra}, researchr = {https://researchr.org/publication/DevillersKP00}, cites = {0}, citedby = {0}, journal = {Journal of Automata, Languages and Combinatorics}, volume = {5}, number = {2}, pages = {81-108}, }