1. Agarwala, K.S.: Sizes and Shapes of hailstones in India. Mausam. 1, 309–311 (1950)
2. Appleman, H.: An investigation into the formation of hail. Nubila. 2, 28–37 (1958)
3. Atlas, D., Wexler, R.: Backscatter by oblate ice spheroids. J. Atmos. Sci. 19, 58–66 (1963)
4. Beckwith, W.B.: Analysis of hailstorms in the Denver network, 1949–1958. In: Weickmann, H. (ed.) Geophysical Monographs No. 5, Physics of Precipitation, pp. 348–353, American Geophysical Union, Washington, D.C. (1960)
5. Beckwith, W.B.: Hail observations in the Denver area. United Air Lines Meteorology Circular No. 40, 41 (1956)