The "-bb" suffix indicates a specific hardware revision. Using the wrong firmware version (e.g., for Sss6698-aa or Sss6698-cb) can permanently brick your drive.
(carefully pry open the plastic casing) and read the markings on the largest chip. Look for numbers like:
Since "SSS6698-BB" refers to a specific manufactured by SSS (Solid State System), often used in 16GB drives, there isn't a traditional academic "paper" titled exactly this.