Margaret Ann Francel, Spencer P. Hurd. Nested balanced ternary designs and Bhaskar Rao designs. Australasian J. Combinatorics, 42:3-20, 2008. [doi]
@article{FrancelH08, title = {Nested balanced ternary designs and Bhaskar Rao designs}, author = {Margaret Ann Francel and Spencer P. Hurd}, year = {2008}, url = {http://ajc.maths.uq.edu.au/pdf/42/ajc_v42_p003.pdf}, researchr = {https://researchr.org/publication/FrancelH08}, cites = {0}, citedby = {0}, journal = {Australasian J. Combinatorics}, volume = {42}, pages = {3-20}, }