Here is the link to a PDF file which you can use as a reference:
The search for a is more than a hunt for a document—it is an exploration of one of aeronautical engineering’s most fascinating trade-offs. The theory teaches us that a tailless aircraft is statically unstable and demands radical airfoils. The practice shows us that with careful design, swept wings, and (in modern times) computers, we can achieve incredible efficiency and stealth. tailless aircraft in theory and practice pdf
Theoretical work in the early 20th century, much of it documented in classic PDFs and technical reports, established three critical requirements for tailless design: Here is the link to a PDF file