LEAN ORGANIZED WORKPLACE: 6S PRACTICAL IMPLEMENTATION
Authors: Inga Skalberga, Henrijs Kalkis, Zenija Roja
Published by: Riga: Latvian Society of Ergonomics, 2022, (96 pages)
ERGONOMICS FOR WORKING WITH DIGITAL DEVICES. PRACTICAL SOLUTIONS
Authors: Zenija Roja, Henrijs Kalkis
Published by: Riga: Latvian Society of Ergonomics, 2022, (44 pages)
PRACTICAL LEAN
Authors: Sandis Babris, Henrijs Kalkis, Martins Pikss, Vladislavs Sorokins
Published by: Business Efficiency Association (printed by SIA “Jelgavas tipografija”, 2021, (325 pages)
APPLICATION OF AUTOGENIC TRAINING IN STRESS SITUATIONS IN NEUROLOGICAL PRACTICE
Author: Inara Roja
Published by: Riga: Latvian Society of Ergonomics, 2020, (30 pages)
HUMAN FACTOR AND ERGONOMICS AT WORK
Authors: Zenija Roja, Henrijs Kalkis
Printed: Riga: Gutenbergs druka, 2020, (295 pages)
COMPUTER ERGONOMICS AND HEALTH PROMOTION AT WORK
Authors: Zenija Roja, Henrijs Kalkis, Inara Roja
Published by: Riga: Latvian Society of Ergonomics, 2018, (56 pages)
WORK RELATED MUSCULAR SKELETAL DISORDERS. ERGONOMICS SOLUTIONS
Authors: Zenija Roja, Inara Roja, Henrijs Kalkis
Printed: Riga: Latvian Ergonomics Society, 2016, (18 pages)
UNIVERSITY OF LATVIA PROFESSOR, HABILITATED DOCTOR IN CHEMISTRY VALDIS KALKIS. BIO-BIBLIOGRAPHY. Authors: Zenija Roja, Henrijs Kalkis, Inara Roja
Printed: Riga: Latvian Ergonomics Society, 2016, (154 pages)
STRESS AND VIOLENCE AT THE WORK. SOLUTIONS
Authors: Zenija Roja, Inara Roja, Henrijs Kalkis
Printed: Riga: Latvian Ergonomics Society, 2016, (94 pages)
OCCUPATIONAL HEALTH AND RISKS AT WORK.
Authors: Valdis Kalkis, Zenija Roja, Henrijs Kalkis
Printed: Riga: Medicinas apgads, 2015, (534 pages)
CONTEMPORARY ERGONOMICS AND BUSINESS 2011
Authors: Zenija Roja, Henrijs Kalkis, Valdis Kalkis
Printed: Riga: University of Latvia Press, 2011, (120 pages)
Basics of ergonomics (in Latvian)
Author: Zenija Roja
Printed: in Riga, 2008, (190 pages)
Work Environment Riska Assesment methods (in Latvian)
Author: Valdis Kalkis
Printed: in Riga, 2008, (245 pages)
NIEBEL`S METHODS, STANDARDS AND WORK DESIGN (13TH ED)
Author: Andris Freivalds
Printed: New York: McGraw-Hill, 2013. (752 pages)
BIOMECHANICS OF THE UPPER LIMBS, MECHANICS, MODELING AND MUSCULOSKELETAL INJURIES (2ND ED)
Author: Andris Freivalds
Printed: USA: CRC Press, 2011, (564 pages)
Work risk factors and protection of workers health
Authors: Z. Roja, V. Kalkis and others.
Printed: Riga, Elpa-2, 2001., 500 pages
WORK MEDICINE
Author: Maja Eglite
Printed: Riga, 2011., 856 pages
Risks at the workplaces (in Latvian)
Authors: V. Kalkis, Z. Roja, H. Kalkis
Printed: Riga, 2007.
Comunitation with PC. Comfort or Discomfort? The Ergonomics will Help You.
Authors: Z. Roja, I. Roja, V. Kalkis, H. Kalkis, I.Laganovska-Dirina
Printed:Riga, 2007
Pain in back? The Ergonomics will Help You.
Authors: Z. Roja, I. Roja, V. Kalkis
Printed:Riga, 2007
Printed: Riga, LU, 2003., 100 pages
Stress and Violence at the workplace
Authors: I. Roja, Z. Roja, H. Kalkis
Printed: Riga, 2006., 49 pages
Autogenic training
Authors: I. Roja, M. Bertholds, J. Zalkalns, Z. Roja
Printed: Riga, 2006., 34 pages
Work environment risk assesment. Handbook.
Authors: V. Kaļķis, I. Kristins, Z. Roja
OCCUPATIONAL HEALTH, SAFETY AND CIVIL DEFENCE
Author: Zenija Roja
Printed: RIga: SIA “Latvijas uzņēmējdarbības un menedžmenta akadēmija”, 2008, (276 pages)
OCCUPATIONAL HEALTH AND SAFETY (2nd print)
Author: Zenija Roja
Printed: Riga: SIA “Latvijas uzņēmējdarbības un menedžmenta akadēmija”, 2007, (291 pages)
Work environment risks
Authors: Z. Roja, V. Kalkis
Printed: Riga, LU, 2004., 74 pages
Ergonomics at the work
Printed: Riga, 2003., 180 pages
Work medicine
Authors:M. Eglite
Printed: Riga, 2000., 704 pages
