@article {Papanikolaou20151039,
	title = {Investigating student understanding of operational-amplifier circuits},
	journal = {American Journal of Physics},
	volume = {83},
	number = {12},
	year = {2015},
	note = {cited By 8},
	pages = {1039-1050},
	doi = {10.1119/1.4934600},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84949553990\&doi=10.1119\%2f1.4934600\&partnerID=40\&md5=a30ae6d3070f7849ef06ae461988cbdc},
	author = {Papanikolaou, C.P. and Tombras, G.S. and Van De Bogart, K.L. and Stetzer, M.R.}
}
