Programming in R to merge search results from Scopus and WoS databases: the Bibliometrix MergeDBSources function

Funding: This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (Capes) - Finance Code 001: Process: 88887.465369/2019-00 (Capes) - Date: 01/10/2019 to 30/09/2023. In other part, this study was financed by Institutional Internationalization Program – CAPES – PrInt: Process: 88887.468908/2019-00 (Call no. 41/2017); Date: 01/02/2020 to 31/12/2020. This work was conducted during a scholarship supported by the Institutional Sandwich Doctorate Program Abroad (PDSE) at the Federal University of Bahia (UFBA), Salvador, Brazil, and University of Valladolid (UVA), Palencia, Spain.

Acknowledgment To Questel, for the kind permission to use and free training of the Orbit^®. To Dr. D. Kouloukoui for technical advice. To Prof. H. Suzuki, for generously sharing information on patent prospecting. To Dr. Jesús Martín-Gil of Department of Agricultural and Forestry Engineering, University of Valladolid (UVA), for the guidelines during the Institutional Sandwich Doctorate Program Abroad (PDSE).