Manoel Lemos. Non-Binary Madroids Having At Most Three Non-Binary Elements. Combinatorics, Probability & Computing, 3:355-369, 1994.
@article{Lemos94, title = {Non-Binary Madroids Having At Most Three Non-Binary Elements}, author = {Manoel Lemos}, year = {1994}, researchr = {https://researchr.org/publication/Lemos94}, cites = {0}, citedby = {0}, journal = {Combinatorics, Probability & Computing}, volume = {3}, pages = {355-369}, }