[1]
Bushra Abdulbari Ahmed and Aymen Ajina 2023. The Impact of Spending on Research and Development on the Global Patent Index for a Sample of Developed Countries for the Period 2007-2021 . Migration Letters. 20, S8 (Nov. 2023), 841–863. DOI:https://doi.org/10.59670/ml.v20iS8.4657.