1. Bichou, K., & Gray, R. (2005). A critical review of conventional terminology for classifying seaports. Transportation Research Part A: Policy and Practice, 39(1), 75–92.
2. Bird, J. (1969). Traffic flows to and from british seaports. Geography, 54, 284–301.
3. Bird, J. (1970). Seaports are not aberrant cases. Area, 4, 65–68.
4. Bird, J. (1984). Seaport development: Some questions of scale. In B. Hoyle & D. Hilling (Eds.), Seaport systems and spatial change (pp. 21–41). Chichester, UK: Wiley.
5. Britton, J. N. H. (1965). Coastwise external relations of the ports of victoria. Australian Geographer, 9(5), 269–281.