1. Energy storage for power systems;Ter-Gazarian,1994
2. The value of storage on power systems with intermittent energy sources;Swift-Hook;Renewable Energy,1994
3. Firm power from the wind;Swift-Hook,1987
4. Is wind power reliable?;Milborrow;New Power UK,2009
5. Research Reports International. Enhancing the value of wind power with energy storage. © 2008/9.