The spectrum of ?-resolvable designs with block size four

@article{Vasiga2001TheSO,
  title={The spectrum of ?-resolvable designs with block size four},
  author={Troy Vasiga and Steven Furino and Alan C. H. Ling},
  journal={Journal of Combinatorial Designs},
  year={2001},
  volume={9},
  pages={1-16}
}
Abstact: An α-resolvable BIBD is a BIBD with the property that the blocks can be partitioned into disjoint classes such that every class contains each point of the design exactly α times. In this paper, we show that the necessary conditions for the existence of α-resolvable designs with block size four are sufficient, with the exception of (α, ν, λ) = (2, 10, 2). © 2000 John Wiley & Sons, Inc. J Combin Designs 9: 1–16, 2001 
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