@article {Varini2013,
	title = {Enhancement of DFT-calculations at petascale: Nuclear Magnetic Resonance, Hybrid Density Functional Theory and Car-Parrinello calculations},
	journal = {Computer Physics Communications},
	volume = {184},
	number = {8},
	year = {2013},
	month = {aug},
	pages = {1827–1833},
	doi = {10.1016/j.cpc.2013.03.003},
	author = {Varini, Nicola and Ceresoli, Davide and Martin-Samos, Layla and Girotto, Ivan and Cavazzoni, Carlo}
}
