I have come across some resources that deals with topography optimization. But it seems like its fundamentals has become a common knowledge such that those resources seems not to deal with this fundamentals.

I understand that the beads are inserted along the trajectories where the stress is increasing in order to increase the stiffness or (and) natural frequency of the structural components.

Please, can someone suggest resources (textbook and papers, written in English language) that deals with the fundamental of topography optimization (and bead insertion)  for structural member. You can also give a layman explanation of this concept? Thank you.