5Meyer D R. A dynamic model of the integration of frontier urban places into the United States system of cities[J]. Economic Geography, 1980, (56) : 39-120.
6Reilly W J. Methods for the study of retail relationships [Z]. University of Texas, 1929, Bulletin (2944) : 1-9.
7Zipf G K. The P1P2 / D Hypothesis:on the intercity movement of persons[J]. American Sociological Review, 1946, (12) :677-686.
8Smith David A. Interaction within a fragmented state: the example of Hawaii[J]. Economic Geography, 1963, 39 (3) : 234-244.
9Haggett P. Locational Analysis in Human Geography [M]. London : Edward Arnold Ltd, 1965.