An Analysis of the Forces Required to Drag Sheep over Various Surfaces (Harvey, J., Culvenor, J., Payne, W., Cowley, S., Lawrance, M., Stuart, D. & Williams, R. 2002, ‘An Analysis of the Forces Required to Drag Sheep over Various Surfaces’, Applied Ergonomics, vol. 33, no. 6, pp. 523-531.) culvenor.com -> publications
Эта статья реально очень важна и полезна?!