1. ctypes - A foreign function library for Python. https://docs.python.org/2/library/ctypes.html [Online; accessed 2017-01-01].
2. Extrae instrumentation package. http://tools.bsc.es/extrae [Online; accessed 2017-02-07].
3. GPAW Manual. https://wiki.fysik.dtu.dk/gpaw/documentation/manual.html [Online; accessed 2017-02-08].
4. GPAW website. https://wiki.fysik.dtu.dk/gpaw [Online; accessed 2017-02-06].
5. sys - System-specific parameters and functions. https://docs.python.org/2/library/sys.html [Online; accessed 2017-01-01].