Paper  bibtex   

@article{zuckerman_historical_2006,
	title = {Historical overview and classification of traditional and digital learning objects},
	url = {https://www.researchgate.net/profile/Oren_Zuckerman/publication/215439639_Historical_Overview_and_Classification_of_Traditional_and_Digital_Learning_Objects/links/00b4951835c68e3503000000/Historical-Overview-and-Classification-of-Traditional-and-Digital-Learning-Objects.pdf},
	journal = {Accessed (February, 2011) from},
	author = {Zuckerman, O.},
	year = {2006},
	note = {ZSCC: 0000030},
	keywords = {Coldigiculture, Digital Culture, Zotero Collection}
}