Dunno who you got these bare-root seedlings from, but they should have come to you with instructions. But don't overthink this. Plant them. They'll come out when they come out. Just don't overwater. Leafless trees need very little of it.
I've grown C. laevigata, which is very closely related, from bare root seedlings. They're always the very last tree to come out of dormancy, but they do it without "sweating." Plant them, then "no sweat" and they'll sprout when they want to. After all, Ma Nature doesn't "sweat" her trees.
That article you cite deals with plants that have been stored during dormancy in refrigerators -- uniformly cold for a long time. I doubt it has anything to do with your trees.