1. Mital A, Kumar S. Chapter 7. Human muscle strength definitions, measurement, and usage: Part I-guidelines for the practitioner. In: Ergonomic Guidelines and Problem Solving. In: Mital A, Kulbom A, Kumar S, editors. Elsevier Ergonomics Book Series Editors. Volume 1. UK, Kindlington: Oxford; 2000
2. Budynas RG, Nisbett JK. Diseño en Ingeniería Mecánica de Shigley. Octava Edición ed. Mc Graw Hill. México: Mc Graw Hill Interamericana; 2008
3. Arenas-Ortiz L, Cantú-Gómez O. Factores de Riesgo de trastornos músculo-esqueléticos crónicos laborables. Medicina Interna de México. 2013;29(4):370-379. Available from: http://www.imbiomed.com.mx/1/1/articulos.php?method=showDetail &id_articulo=94646&id_seccion=1479&id_ejemplar=9249&id_revista=47 [Accessed: 14-02-2018]
4. Occupational Safety & Health Administration. Safety and Health Topics. Ergonomics [Internet]. USA. 2018. Available from: https://www.osha.gov/SLTC/ergonomics/ [Accessed: 25-01-2018]
5. Cohen A, Gjessing C, Fine L, Bernard B, McGlothlin J. Element of Ergonomic Programs. A primer based on workplace evaluations of musculoskeletal disorders. DHHS (NIOSH) Publication No. 97-117. 1997. Available from: http://www.cdc.gov/niosh/docs/97-117/ [Accessed: 21-02-2018]