Bak P, Tang C, Wiesenfeld K. Self-organized criticality: An explanation of the 1/f noise. Physical Review Letters. 1987;(4):381-384.

Kohmoto M, Sutherland B, Tang C. Critical wave functions and a Cantor-set spectrum of a one-dimensional quasicrystal model. Physical Review B. 1987;(3):1020-1033.

Tang C, Wiesenfeld K, Bak P, Coppersmith S, Littlewood P. Phase organization. Physical Review Letters. 1987;(12):1161-1164.