The temperature dependence of the thermoelectric power ͑TEP͒ of metallic systems with cerium and ytterbium ions exhibits characteristic features which we explain by the Coqblin-Schrieffer model ͑CSM͒. We specify a given system by the degeneracy and splitting of the crystal-field ͑CF͒ levels, the strength of the exchange and potential scattering, and the number of f electrons or f holes; for cerium and ytterbium ions we assume n f р1 and n f hole р1, respectively. The Kondo temperature T K is then generated by the ''poor man's PHYSICAL REVIEW B 68, 104432 ͑2003͒

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