[1] 李清银. Closed-set lattice of regular sets based on a serial and transitive relation through matroids[J]. International Journal of Machine Learning and Cybernetics, 2014, 5(3): 395-401.
[2] 李清银. Covering-based approximation operators by boolean matrix[C]//Granular Computing (GrC), 2012 IEEE International Conference on. IEEE, 2012: 236-241.