1. 1. EJIRI, S., Y. YAMAGUCHI, T. NAGASE, T. ITOH and T. KATUMATA. 1984. Occurrence of endogenous pollen growth inhibitors, 4-hydroxybenzoic-acid and 4-(β-D-glucopyranosyloxy) benzoic acid, int he pollen of Pinus densiflora. Agric. Chem. 48: 2565-2566.
2. 2. GALET, P. 1964. Cepages et vignobles de France. Tome IV. Les Raisins de Table, p. 3134-3144. Paysan du Midi. Montpellier.
3. 4. HIRATUKA, S. andT. TEZUKA. 1980. Changesinproteinsafterself-andcross-pollination in Japanese pear. J. Japan. Soc. Hort. Sci. 49: 57-64.
4. 5. HIRATUKA, S., E. TAKAHASI and N. HIRATA. 1987. Pollen tube growth inhibitors involved in the ovary of self-incompatible Japanese pear. Plant Cell Physiol. 28: 293-299.