We generalize a construction by Treash of a Steiner triple system on \(2v+1\) points that embeds a Steiner triple system on \(v\) points. We show that any Steiner quadruple system on \(v+1\) points may be embedded in a Steiner quadruple system on \(2v+2\) points.
Citation
Chester W.J. Liu, Peter R.Wild. Embeddings of Steiner Quadruple Systems[J], Ars Combinatoria, Volume 065. 245-250. .