Library of matrices:
Sufficient matrices
IM_SU by Tibor Illés and Sunil Morapitiye
ENM_SU by Marianna E.-Nagy
ENM_VA_1 by Marianna E.-Nagy and Anita Varga (larger matrices in Anita's PhD thesis)
ENM_VA_2 by Marianna E.-Nagy and Anita Varga (large matrices)
Non-sufficient matrices
IM_NSU by Tibor Illés and Sunil Morapitiye
ENM_NSU by Marianna E.-Nagy