1. Billington, E.J., Cavenagh, N.J., Khodkar, A.: Super-simple twofold 4-cycle systems. Bull. ICA 63, 48–50 (2011)
2. Bluskov, I., Hämäläinen, H.: New upper bounds on the minimum size of covering designs. J. Combin. Des. 6, 21–41 (1998)
3. Cavenagh, N.J., Billington, E.J.: On decomposing complete tripartite graphs into 5-cycles. Australas. J. Combin. 22, 41–62 (2000)
4. Chen, K.: On the existence of super-simple
$$(v,4,3)$$
(
v
,
4
,
3
)
-BIBDs. J. Combin. Math. Combin. Comput. 17, 149–159 (1995)
5. Chen, K.: On the existence of super-simple
$$(v,4,4)$$
(
v
,
4
,
4
)
-BIBDs. J. Stat. Plann. Inference 51, 339–350 (1996)