TY - JOUR T1 - A comparison of results of empirical studies of supplementary search techniques and recommendations in review methodology handbooks: a methodological review JO - Systematic Reviews UR - https://eprints.whiterose.ac.uk/id/eprint/124665 UR - https://doi.org/10.1186/s13643-017-0625-1 PY - 2017/11/28 AU - Cooper C AU - Booth A AU - Britten N AU - Garside R ED - DO - DOI: 10.1186/s13643-017-0625-1 PB - BioMed Central VL - 6 Y2 - 2025/10/31 ER -