Terrible writing! The author uses too many parenthetical phrases. And he adds nothing substantial merely standing on other people's work. And for goodness sakes, latex has ways of providing links sensibly. Please use it!
anyway to your other point: synthesizing concepts from many writers to join them into one new framework is an age-old style of writing. There’s nothing particularly strange about it; it’s putting the author’s viewpoint in context with other prior writing that the audience is either familiar with or may be interested in reading to see those viewpoints further explored.