B. Nouvel and E. Rémila, Configurations induced by discrete rotations: Periodicity and quasiperiodicity properties, Discrete Applied Mathematics, vol.147, pp.325-343, 2005.

T. Kong and A. Rosenfeld, Digital topology: Introduction and survey. Computer Vision, Graphics, and Image Processing, vol.48, pp.357-393, 1989.

R. Klette and A. Rosenfeld, Digital Geometry: Geometric Methods for Digital Picture Analysis, 2004.

V. A. Kovalevsky, Finite topology as applied to image analysis. Computer Vision, Graphics, and Image Processing, vol.46, pp.141-161, 1989.

L. Middleton and J. Sivaswamy, Hexagonal Image Processing: A Practical Approach. Advances in Pattern Recognition, 2005.

J. Serra, Image Analysis and Mathematical Morphology, 1982.

I. Her, Geometric transformations on the hexagonal grid, IEEE Transactions on Image Processing, vol.4, pp.1213-1222, 1995.

K. Pluta, P. Romon, Y. Kenmochi, and N. Passat, Bijective digitized rigid motions on subsets of the plane, Journal of Mathematical Imaging and Vision, vol.59, pp.84-105, 2017.
URL : https://hal.archives-ouvertes.fr/hal-01497610

P. Ngo, Y. Kenmochi, N. Passat, and H. Talbot, Topology-preserving conditions for 2D digital images under rigid transformations, Journal of Mathematical Imaging and Vision, vol.49, pp.418-433, 2014.
URL : https://hal.archives-ouvertes.fr/hal-00838183

B. Nouvel and E. Rémila, On colorations induced by discrete rotations, DGCI, Proceedings, vol.2886, pp.174-183, 2003.

J. Gilder, Integer-sided triangles with an angle of 60 ?, The Mathematical Gazette, vol.66, pp.261-266, 1982.

R. A. Gordon, Properties of Eisenstein triples. Mathematics Magazine, vol.85, pp.12-25, 2012.

V. Berthé and B. Nouvel, Discrete rotations and symbolic dynamics, Theoretical Computer Science, vol.380, pp.276-285, 2007.

Y. Thibault, Rotations in 2D and 3D discrete spaces, 2010.
URL : https://hal.archives-ouvertes.fr/tel-00596947