Citation: B. Thiebaut et al., MATERNAL DESCENDANTS OF THE TORTILLARD BE ECH (FAGUS-SYLVATICA L. VAR. TORTUOSA PEPIN) - DEVELOPMENT DURING THE FIRST 4 YEARS - 1 - FERTILITY, STRENGTH AND APPEARANCE OF THE TORTILLARD PHENOTYPE, Canadian journal of botany, 76(1), 1998, pp. 12-22