paktinat,H , abaspour,R , ashournezhad,G , esmaeilzadeh,M and hoshmand,F . (2016). A new Approach to Combine Multi- Criteria Decision Making Systems and Gray Clustering Method for Spatial Optimization of Environmental Monitoring Stations (Case Study: Naybandan Wildlife Refuge). Environmental Researches, 6(11), 41-79.

paktinat,H , , abaspour,R , , ashournezhad,G , , esmaeilzadeh,M , and hoshmand,F . "A new Approach to Combine Multi- Criteria Decision Making Systems and Gray Clustering Method for Spatial Optimization of Environmental Monitoring Stations (Case Study: Naybandan Wildlife Refuge)", Environmental Researches, 6, 11, 2016, 41-79.

paktinat H, abaspour R, ashournezhad G, esmaeilzadeh M, hoshmand F. (2016). 'A new Approach to Combine Multi- Criteria Decision Making Systems and Gray Clustering Method for Spatial Optimization of Environmental Monitoring Stations (Case Study: Naybandan Wildlife Refuge)', Environmental Researches, 6(11), pp. 41-79.

H paktinat, R abaspour, G ashournezhad, M esmaeilzadeh and F hoshmand, "A new Approach to Combine Multi- Criteria Decision Making Systems and Gray Clustering Method for Spatial Optimization of Environmental Monitoring Stations (Case Study: Naybandan Wildlife Refuge)," Environmental Researches, 6 11 (2016): 41-79,

paktinat H, abaspour R, ashournezhad G, esmaeilzadeh M, hoshmand F. A new Approach to Combine Multi- Criteria Decision Making Systems and Gray Clustering Method for Spatial Optimization of Environmental Monitoring Stations (Case Study: Naybandan Wildlife Refuge). Environmental Researches. 2016;6(11):41-79 (In Persian).