1. Hanani, H., On Quadruple Systems, Canad. J. Math., 1960, vol. 12, pp. 145–157.
2. Lindner, C.C. and Rosa, A., Steiner Quadruple Systems-A Survey, Discrete Math., 1978, vol. 22, no. 2, pp. 147–181.
3. Hartman, A. and Phelps, K.T., Steiner Quadruple Systems, Contemporary Design Theory: A Collection of Surveys, ch. 6, Dinitz, J.H. and Stinson, D.R., Eds., New York: Wiley, 1992, pp. 205–240.
4. The CRC Handbook of Combinatorial Designs, Colbourn, C.J. and Dinitz, J.H., Eds., Boca Raton: CRC Press, 1996.
5. Tonchev, V.D., A Mass Formula for Steiner Triple Systems STS(2n − 1) of Rank 2n − n, J. Combin. Theory, Ser. A, 2001, vol. 95, no. 2, pp. 197–208.