A Combinatorial Problem Arising in the Study of Reaction-Diffusion Equations
S.I.A.M. Journal on Algebraic and Discrete Methods
C. Greene, J. Greenberg and S. Hastings “A combinatorial problem arising in the study of reaction-diffusion equations”, S.I.A.M. Journal on Algebraic and Discrete Methods 1 (1980), 34-42. Also appears as U. Wisconson Math. Res. Center Tech. Report No. 1850, 104-120.