Elizabeth J. Billington, D. G. Hoffman. Pairs of simple balanced ternary designs with prescribed numbers of triples in common. Australasian J. Combinatorics, 5:59-72, 1992. [doi]
@article{BillingtonH92,
title = {Pairs of simple balanced ternary designs with prescribed numbers of triples in common},
author = {Elizabeth J. Billington and D. G. Hoffman},
year = {1992},
url = {http://ajc.maths.uq.edu.au/pdf/5/ocr-ajc-v5-p59.pdf},
researchr = {https://researchr.org/publication/BillingtonH92},
cites = {0},
citedby = {0},
journal = {Australasian J. Combinatorics},
volume = {5},
pages = {59-72},
}