Bogdanova, Galina, Svilen Stefanov, Todor Todorov, Jordan Shterev, and Nikolay Noev. “The Knowledge in Automotive Field Representation With Modern Technologies”. Digital Presentation and Preservation of Cultural and Scientific Heritage 1 (September 30, 2011): 179. Accessed May 20, 2024. https://dipp.math.bas.bg/dipp/article/view/dipp.2011.1.21.