KUCUKCIFCI, SELDA; LINDNER C.C. The metamorphosis of λ-fold block designs with block size four into λ-fold (K4 \ e)-systems, λ ≥ 2. Utilitas Mathematica , [S. l.], v. 63, 2003. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/295. Acesso em: 8 may. 2026.