Page 95 - Exquisite Modular Origami

Publishing 2007.

[Wan11] Patsy Wang-Iverson, Robert Lang, Mark Yim, Origami 5: Fifth
International Meeting of Origami Science, Mathematics, and Education, A K

Peters/CRC, 2011.

[Yam90] Makoto Yamaguchi, Kusudama Ball Origami, Japan Publications,

1990.