1. Goldberger, A.L., B.L. West, T. Dresselhaus and V. Bhargava (1985). Bronchial asymmetry and Fibonacci scaling. Experientia 41: 1537–1538.
2. Horsfield, K. and G. Cumming (1967). Angles of branching and diameters of branches in the human bronchial tree. Bull. Math. Biophys. 29: 245–259.
3. Horsfield, K. and G. Cumming (1968). Morphology of the bronchial tree in man. J. Appl. Physiol. 24: 373–383.
4. Horsfield, K., G. Dart, D.E. Olson, G.F. Filley and G. Cumming (1971). Models of the human bronchial tree. J. Appl. Physiol. 31: 207–217.
5. Horsfield, K., W. Kemp and S. Phillips (1982). An asymmetrical model of the airways of the dog lung. J. Appl. Physiol. 52: 21–26.