AKHIL,ABBAS ALI; MARNAY,CHRIS & KIPMAN,TIMOTHY. Review of Test Facilities for Distributed Energy Resources, report, May 1, 2003; (https://digital.library.unt.edu/ark:/67531/metadc738760/m1/1/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .