Petry, F. E., Robinson, V. B., & Cobb, M. A. (2005). Fuzzy Modeling with Spatial Information for Geographic Problems. Springer Berlin Heidelberg. https://doi.org/10.1007/b138243

Petry, Frederick E., Vincent B. Robinson, and Maria A. Cobb. Fuzzy Modeling with Spatial Information for Geographic Problems. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. https://doi.org/10.1007/b138243.

Petry, Frederick E., et al. Fuzzy Modeling with Spatial Information for Geographic Problems. Springer Berlin Heidelberg, 2005. https://doi.org/10.1007/b138243.