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Isolement et proprietes physico-chimiques de polysaccharides synthetises par deux souches bacteriennes de la rhizosphere de Brachypodium ramosumJ. Cortez; G. Billes; M. Metche · 1976
Effect of climate, soil type and earthworm activity on nitrogen transfer from a nitrogen-15-labelled decomposing material under field conditionsJ. Cortez; G. Billes; M. B. Bouché · 2000
The isotopic composition of the soil microbial biomass and of adenine and guanine isolated from soil incubated with 14C- and 15N-labelled plant material: Comparison with fumigation methodJ. Cortez; G. Billes; P. Bottner · 1985