@misc{indiciaeca11a150f475, title = {Retrieval from a large, integrated HIS-database through formal descriptions and SQL.}, author = {M P Hooymans and H Liefkes and J A Schipper and A R Bakker}, year = {1995}, url = {https://pubmed.ncbi.nlm.nih.gov/8591236/}, note = {Source identifier: 8591236} }