The way the system gets bootstrapped is humans create the first human level AI. The definition of a human level AI is it is able to do all the activities a human can do and so it can also make human level AIs too.

Once you have one human level AI you can make more replacing each human in the production of the human level AI - you basically start at the end point and working backwards replacing each job performed by a human with an AI. Once you get to the final job you will have a production system that can build AIs without any human labor. The system can make as many extra AI’s as wanted without any human labor - it is detached from the human labor market.

Unfortunately I don’t have any links discussing this. I think not too many people dwell on human level AI’s because the expectation is with AI’s if they can get to human level they will not stay at human level. Once you have AI’s that can make AI’s then they can make better AI’s until they far surpass human level. Understanding what these AI’s will be like is impossible for us.