@article {johnson2017cost,
	title = {The Cost (s) of Geospatial Open Data},
	journal = {Transactions in GIS},
	volume = {21},
	number = {3},
	year = {2017},
	pages = {434{\textendash}445},
	author = {Johnson, Peter A and Sieber, Renee and Scassa, Teresa and Stephens, Monica and Robinson, Pamela}
}
