@proceedings {Wolf1976,
	title = {Historical Development of Solar Cells},
	year = {1976},
	note = {<br />},
	publisher = {IEEE Press},
	author = {M. Wolf}
}
@article {Wolf1963,
	title = {Series Resistance Effects on Solar Cell Measurements},
	journal = {Advanced Energy Conversion},
	volume = {3},
	year = {1963},
	author = {M. Wolf and H. Rauschenbach}
}
