@article {27694,
	title = {Simultaneous vehicle crossing effects on fatigue damage equivalence factors for north American roadway bridges},
	journal = {Journal of Bridge Engineering},
	volume = {18},
	year = {2013},
	url = {:1309-1318},
	author = {Walbridge, S. and Fischer, V. and Maddah, N. and Nussbaumer, A.}
}