I haven't read the links above but I will tell you what I do when I bring a new puppy home.
Most of the times I've brought in a new one, they have been between 8-12 weeks of age, and I've usually had 3 adults already.. My dogs aren't golden retrievers who like every dog they see either
Anyhow, I usually take the puppy in my backyard (fenced) and let them explore for a bit, I then switch, the adult dogs go out, the puppy comes in the house for a bit..I then carry new puppy outside, and sit with the puppy in my lap and let everyone check them out
Usually my husband is throwing balls, frisbees for the others whatever,,After the initial checking out on the adults part, gives me a pretty good idea of how things are gonna go, and so far (knock on wood) it's always been pretty positive , no negative vibes.
So after a bit I'll set puppy down and let them check things out on their own. So far, in my experience, I've never had any of the adults attack, maul , or be mean to 'said' puppy.
Everyone is carefully supervised the first few days, because well, puppies can be brats and adult dogs sometimes do not appreciate their brattiness
Growling, showing teeth from an adult dog towards a puppy who's being a brat is not un normal, I always gage the situation which will determine my response or lack of.