@unpublished{miis133,
           month = {February},
           title = {Maximizing the contribution of wind power in an electric power grid},
          author = {Geoff Pritchard and Winston L. Sweatman and Kim Nan and Mike Camden and Bill Whiten},
            year = {2007},
             url = {http://www.maths-in-industry.org/miis/133/}
}