Copyright (c) 1996-2015, Power System Engineering Research Center (PSERC)
Copyright (c) 2010-2015 Richard Lincoln
The code in PYPOWER is distributed under the 3-clause BSD license below. The PYPOWER case files distributed with PYPOWER are not covered by the BSD license. In most cases, the data has either been included with permission or has been converted from data available from a public source.
While not required by the terms of the license, we do request that publications derived from the use of MATPOWER explicitly acknowledge that fact by citing:
R. D. Zimmerman, C. E. Murillo-Sanchez, and R. J. Thomas, "MATPOWER: Steady-State Operations, Planning and Analysis Tools for Power Systems Research and Education," Power Systems, IEEE Transactions on, vol. 26, no. 1, pp. 12–19, Feb. 2011.