Does anybody know of research papers or academic resources that study the full development and growth of medieval cities? I mean, from village stage to city stage. Or maybe cities did not develop that way. I'm trying to know what usually happened, in the most accurate and comprehensive way possible, since the "foundation" of what would be a city up to c. AD 1450. I know of course that most surviving cities c. AD 500 were old roman forts etc., but were there any cities founded in Europe in the middle ages that are chronicled?
I am also curious about population in cities and villages. I mean, I know large medieval cities had around 20,000 people, but where did they live? As far as I know, medieval houses were not that big and there weren't many of them in cities and villages.
By the way, I'm only talking Europe here.