Finding the automorphism group of a circulant association scheme in polynomial time. Ponomarenko, I.N. — 2005 Zapiski Nauchnykh Seminarov POMI
On the vertex connectivity of a relation in an association scheme. Evdokimov, S.A.; Ponomarenko, I.N. — 2004 Zapiski Nauchnykh Seminarov POMI