Triplets by Fowler/Tarnai/Kabai

 Packing regular triplets of circles on a sphere  

P. W. FOWLE R, T. TARNAI AND S. KABAI

Proc. R. Soc. A (2005) 461, 2355–2367 doi:10.1098/rspa.2005.1464

Published online 21 June 2005