GHIDRA, V.; ARDELEAN, M.; SESTRAS, R. E.; TAMAS, E.; CORDEA, M.; DEJEU, M.; COSTIN, L.; BORS, A. Architectural ideotype of pear seedling in five hybrid combinations. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, v. 28, n. 1, p. 49-52, 5 Aug. 1998.