Douglas R. Stinson, Scott A. Vanstone. A Combinatorial Approach to Threshold Schemes. In Carl Pomerance, editor, Advances in Cryptology - CRYPTO 87, A Conference on the Theory and Applications of Cryptographic Techniques, Santa Barbara, California, USA, August 16-20, 1987, Proceedings. Volume 293 of Lecture Notes in Computer Science, pages 330-339, Springer, 1987. [doi]