1. Derivation of the negative exponential model by an entropy maximizing method;Bussiére;Environment and Planning,1970
2. Urban Population densities;Clark;J. Roy. Statist. Assoc. Ser. A,1951
3. Employment Trends in Central Cities;Cohen,1969
4. Land-use theory and the spatial structure of the nineteenth-century city;Fales,1973
5. Anatomy of a Metropolis;Hoover,1959