[1. Comar CL, Sagan LA. Health Effects of Energy Production and Conversion. Annual Review of Energy. 1976;1:581-600.10.1146/annurev.eg.01.110176.003053]Search in Google Scholar
[2. da Costa BR, Vieira ER. Risk factors for work-related musculoskeletal disorders: A systematic review of recent longitudinal studies. Am J Ind Med. 2010;53(3):285-323.]Search in Google Scholar
[3. Fritzsche AF. The Health Risks of Energy Production. Risk Analysis, 1989;9(4);565-77.10.1111/j.1539-6924.1989.tb01267.x]Search in Google Scholar
[4. Elenkova A, Kadreva-Tarnovska. Arterial Hypertension. In: Krastev Z editor, Internal Medicine 2nd ed. Sofia: Ivan Sapundzhiev EOOD; 2010. p. 136-148.]Search in Google Scholar
[5. Liubchenko PN, Vinnitskaia TE. The structure of occupational morbidity in electric welders. Med Tr Prom Ekol. 2000;8:7-10. Russian.]Search in Google Scholar
[6. Yu IJ, Song KS, Chang HK, Han JH, Chung YH, Han KT, et al. Recovery from manual metal arc-stainless steel welding-fume exposure induced ling fibrosis in Sprague-Daawley rats. Toxicol Lett. 2003;143(3):247-59.10.1016/S0378-4274(03)00154-1]Search in Google Scholar
[7. Petkova E. Occupational diseases of inorganic powders. Sofia; Investpres AD: 2005.]Search in Google Scholar
[8. Apostolova D. Petrol. Benzene and homologues. In: Kostova V, Petkova V, editors. Occupational diseases. Sofia: Ral-kolobar; 2007. p. 72-8.]Search in Google Scholar
[9. Petkova, V. Poisoning with organic solvents. . In: Kostova V, Petkova V, editors. Occupational diseases. Sofia: Ral-kolobar; 2007. p. 70-2.]Search in Google Scholar
[10. Burström L, Nilsson T, Wahlström J. Whole-body vibration and the risk of low back pain and sciatica: a systematic review and meta-analysis. Int Arch Occup Environ Health. 2014. doi: 10.1007/s00420-014-0971.4.]Search in Google Scholar
[11. Punnett L. Musculoskeletal disorders and occupational exposures: how should we judge the evidence concerning the causal association? Scand J Public Health. 2014;42(13 Suppl):49-58.10.1177/140349481351732424553854]Search in Google Scholar
[12. Bovenzi M. Criteria for case definitions for upper limb and lower back disorders caused by mechanical vibration. Med Lav. 2007;98(2):98-110.]Search in Google Scholar