Modal decomposition and normal form for hydrodynamic flows: Examples from cellular flame patternsJ.D. Kelley, G.H. Gunaratne, A. Palacios and J. ShulmanEur. Phys. J. Special Topics, 204 (2012) 119-131DOI: https://doi.org/10.1140/epjst/e2012-01556-8