The estuary types in coastal explorer are based on these papers:
Day, J.H. (1981). Estuarine ecology with particular reference to southern Africa.
J. Day (Ed). A.A. Balkema, Cape Town, 1981. 411pp.Heath, R.A. (1976). Broad classification of New Zealand estuaries with respect to residence times. New Zealand Journal of Marine and Freshwater Research: 10 (3): 429-444.
Healy, T.R.; Kirk, R.M. (1982). Coasts. Pp. 81-104 in Soons JM, Selby MJ, editors. Landforms of New Zealand. Longman Paul, Auckland. 402pp.
Hume, T.M.; Herdendorf, C.E. (1988). A geomorphic classification of estuaries and its application to coastal resource management - A New Zealand example. Journal of Ocean and Shoreline Management 11: 249–274.
Hume, T.M.; Herdendorf, C.E. (1993). On the use of empirical stability relationships for characterising inlets. Journal of Coastal Research 9: 413–422.
Hume, T.; Snelder, T.; Weatherhead, M.; Liefting, R. (2007). A controlling factor approach to estuary classification. Journal of Ocean and Coastal Management. Volume 50, Issues 11–12, Pp. 905–929. http://dx.doi.org/10.1016/j.ocecoaman.2007.05.009
Pritchard, D.W. (1967). Observation of circulation in coastal plain estuaries. In: Lauff GH, editor. Estuaries, Washington, DC: American Association for the Advancement of Science. p.3-5.