Peter Adams, Elizabeth J. Billington. Lambda-fold 3-perfect 9-cycle systems. Ars Comb., 44, 1996.
@article{AdamsB96,
title = {Lambda-fold 3-perfect 9-cycle systems},
author = {Peter Adams and Elizabeth J. Billington},
year = {1996},
researchr = {https://researchr.org/publication/AdamsB96},
cites = {0},
citedby = {0},
journal = {Ars Comb.},
volume = {44},
}