Perfekt is a book publisher in Slovakia, which has published two books of paper models. The first, titled simply "Vystrihovačky", was published in 2008 and contains models by Marián Hlaváč. The second, titled "Papierové modely. Vystrihovačky" and published in 2012, has 31 models by Ladislav Jakubčo. Both designers have contributed many models to ABC Magazine in the past, and Jakubčo at least is now contributing to a somewhat similar Slovak magazine called "Fifik".
I have the book by Jakubčo, which includes two motorcycles.