MAP20120016217 Rezagholi, Mahmoud Cost efficiency comparison of four video-based techniques for assessing upper arm postures / Mahmoud Rezagholi, Svend Erik Mathiassen, Per Liv En: Ergonomics : the international journal of research and practice in human factors and ergonomics. - Oxon [United Kingdom] : Taylor & Francis, 2010- = ISSN 0014-0139. - 01/03/2012 Volumen 55 Número 3 - marzo 2012 I. Mathiassen, Svend Erik . II. Liv, Per . III. Título.