Residual shear strength estimation in cohesionless soils is a critical aspect of geotechnical engineering, particularly in the context of foundation design and stability assessment. This bibliometric review aims to provide a comprehensive overview of the research conducted on the estimation of residual shear strength using Standard Penetration Test (SPT) and Cone Penetration Test (CPT) data. Residual shear strength is a fundamental parameter in assessing the stability of soil slopes, embankments, and retaining walls, as well as in the design of shallow and deep foundations. This review synthesizes and evaluates the existing literature to highlight the key findings, methodologies, and trends in this field. The objective is to provide geotechnical engineers, researchers, and practitioners with a valuable resource for understanding the state of the art in residual shear strength estimation using SPT and CPT data.