We consider all \(2-(v,3)\) trades in which every pair appears at most once in each part of the trade, and we call them Steiner Triple Trades \({STT}(v)\). We completely classify \({STT}(v)\) with \(6 \leq vol(T) \leq 9\).
Citation
G.B. KHOSROVSHAHI, H.R. MAIMANI. On \(2\)-\((v,3)\) Steiner. Trades of Small Volumes[J], Ars Combinatoria, Volume 052. 199-220. .