12. HAYES J.R., SHEEDY J.E., STELMACK J.A., HEANEYM C.A.: Computer use, symptoms and quality of life. Optometry & Vision Science 84 (4) S. 739 - 774 (2007)

12. HAYES J.R., SHEEDY J.E., STELMACK J.A., HEANEYM C.A.: Computer use, symptoms and quality of life. Optometry & Vision Science 84 (4) S. 739 - 774 (2007)