Eiichi Bannai, Etsuko Bannai. On optimal tight 4-designs on 2 concentric spheres. Eur. J. Comb., 27(2):179-192, 2006. [doi]
@article{BannaiB06,
title = {On optimal tight 4-designs on 2 concentric spheres},
author = {Eiichi Bannai and Etsuko Bannai},
year = {2006},
doi = {10.1016/j.ejc.2004.10.001},
url = {http://dx.doi.org/10.1016/j.ejc.2004.10.001},
researchr = {https://researchr.org/publication/BannaiB06},
cites = {0},
citedby = {0},
journal = {Eur. J. Comb.},
volume = {27},
number = {2},
pages = {179-192},
}