Paper  bibtex   

@article{spasser_realist_2002,
	title = {Realist activity theory for digital library evaluation: {Conceptual} framework and case study},
	url = {https://link.springer.com/article/10.1023/A:1015288305397},
	journal = {Computer Supported Cooperative Work (CSCW)},
	author = {Spasser, M. A.},
	year = {2002}
}