//-->
Workload of window cleaners using ladders differing in rung separation
Hoozemans, Marco J.M., (2005)
Effect of design of two-wheeled containers on mechanical loading
Kingma, Idsart, (2003)
Effect of the number of two-wheeled containers at a gathering point on the energetic workload and work efficiency in refuse collecting
Kuijer, P.Paul F.M., (2002)