1. BUCHNER, P. (1965) Endosymbiosis of Animals with Plant Microorganisms, Revised English Version, New York : Interscience Publishers, 909p.
2. GRACE, T. D. C. (1962) Establishment of four strains of cells from insect tissues grown in vitro. Nature 195 : 788.
3. KUSUMI, T., Y. SUWA, H. KITA, and S. NASU (1979) Symbiotes of planthoppers: I. The isolation of intracellular symbiotes from the smaller brown planthopper, Laodelphax striatellus FALLÉN (Hemiptera : Delphacidea). Appl. Ent. Zool. 14 : 459-463.
4. MITSUHASHI, J. (1975) Cultivation of intracellular yeast-like organisms in the smaller brown planthopper, Laodelphax striatellus FALLÉN (Hemiptera : Delphacidea). Appl. Ent. Zool. 10 : 243-245.
5. NASU, S. (1965) Studies on some leafhoppers and planthoppers which transmit virus disease of rice plant in Japan. Bull. Kyushu Agr. Expt. Stn. 8 : 153-349.