1. Bach, W. D. and Vukovich, F. M.: 1981, ?Optimum Meteorological and Air Pollution Sampling Network Selection in the Cities: Vol. III Objective Variational Analysis Model?, EPA-600/S4-81-012.
2. Buell, R. J.: 1975, ?Objective Procedures for Optimum Allocation of Air Pollution Observation Stations?, Research Traingle Park, North Carolina, US EPA-650/4-75-005.
3. Chuang, C. Y.: 1977, ?The characteristics of Air Pollution in Taiwan Area, Republic of China?, Proceedings of the Fourth International Clean Air Congress at Tokyo, IV-20, pp. 539?545.
4. Barby, W. P., Ossenbruggen, P. J., and Gregory, C. J.: 1974, ?Optimization of Urban Air Monitoring Networks?, Journal of Environmental Engineering Division, A.S.C.E., 100, 577?591.
5. David, F. N.: 1980, ?Tables for the Ordinates and the Probability Integral of the Distribution of the Correlation Coefficient in Small Smaples?, The Biometrika Office, Cambridge University Press, Cambridge, England, Vol. 14, No. 6, pp. 681?693.