Cyclically resolvable cyclic Steiner triple systems of order 21 and 39 Original Research Article

All cyclically resolvable cyclic Steiner triple systems of order 21 and 39 are enumerated. Up to isomorphism, there are exactly 2 such triple systems of order 21 and 528 of order 39. As a by-product, there are at least 616 non-isomorphic resolvable Steiner triple systems of order 39.