GHIDRA, V.; CHIS, I.; SESTRAS, R. E.; DEJEU, M. PEAR VARIETIES AND SELECTIONS, WITH EXTRA-EARLY AND EARLY RIPENING, OBTAINED AT THE FRUIT RESEARCH STATION CLUJ (FRS CLUJ). Notulae Botanicae Horti Agrobotanici Cluj-Napoca, v. 32, n. 1, p. 48-51, 5 Aug. 2004.