Perhaps you should try some spelling variations:
"stochastic difference equations" » "stochastic differential equations"
"stochastic difference equationss" » "stochastic differential equationss", "stochastic difference equation", "stochastic differences equations", "stochastic differenced equations"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("stochastic difference equations") OR ("stochastic difference equationss")).
• Removing quotes may allow a broader search: (( stochastic difference equations ) or ( stochastic difference equationss )).
• Adding a wildcard symbol may retrieve word variants: (("stochastic difference equations") or ("stochastic difference equationss"))*.