References
- Horton, R. E., 1932: Drainage basin characteristics. — Trans. Amer. geophys. Un., 1932, 350–361.
- Horton, R. E. 1945: Erosional development of streams and their drainage basins: hydrophysical approach to quantitative morphology. — Bull, geol. Soc. Amer., 56, 275–370.
- Morisawa, Marie, 1957: Accuracy of determination of stream lengths from topographic maps. — Trans. Amer. geophys. Un., 38, 86–88.
- Strahler, A. N., 1957: Quantitative analysis of watershed geomorphology. Ibid., 38, 913–920.