sechel? (according to making of a gadal – who makes up many things so i dont know how trustworthy he is -)
This book has enormous number of citations, I never saw anything documented as well as this sefer. Maybe you think so because you skipped over little numbers in the main text. These are called endnotes and refer to specific people and books. They are at the end of the book in fine print and are even more interesting than the main text.