Work Related Musculoskeletal Disorders (WRMSD) in Construction Workers and Main Causes. - Zenija Roja; Henrijs Kalkis; Inara Roja; Janis Zalkalns (AHFE (18), 2017)

Physical Workload Analysis in Processing Operations: Metal Processing Manufacturing. - Zenija Roja; Henrijs Kalkis; Sandis Babris; Inara Roja; Kristine Bokse; Ansis Ventins (AHFE (16), 2019)

Human Resource Development Opportunities in Latvian Health Care Organization. - Henrijs Kalkis; Ansis Ventins; Sandis Babris; Zenija Roja; Kristine Bokse (IHSI, 2019)

Physical Load and Preventive Measures in Metal Manufacturing Industry. - Henrijs Kalkis; Kristine Andza; Zenija Roja (AHFE (15), 2020)

Causes of Work Related Musculoskeletal Disorders in the Textile Industry. - Henrijs Kalkis; Zenija Roja; Gunta Vaisla; Inara Roja (AHFE (15), 2020)

Ergonomic Indicators and Physical Workload Risks in Food Production and Possibilities for Risk Prevention. - Henrijs Kalkis; Ingus Graveris; Zenija Roja (AHFE (15), 2021)