1. The supercooling of water;Bigg,1953
2. The Physics of Rain Clouds;Fletcher,1962
3. The embryo and formation of graupel;Harimaya;J. Meteorol. Soc. Jpn.,1976
4. The internal structure and embryo of graupel;Harimaya,1977
5. A further study on the internal structure of graupel;Harimaya,1983