\newchapter{Gray code} \leveldown{} \input{gray_code/SMT/main_EN} \input{gray_code/MaxSAT/main_EN} \myheading{Further reading} \begin{itemize} \item Martin Gardner -- Knotted Doughnuts and Other Mathematical Entertainments, page 22. \item Donald Knuth -- \ac{TAOCP}, PRE-FASCICLE 2A\footnote{\url{https://yurichev.com/mirrors/Donald\%20Knuth/TAOCP\%202a\%207.2.1.1/fasc2a.pdf}}. \item Jörg Arndt -- Matters Computational\footnote{\url{https://www.jjj.de/fxt/fxtbook.pdf}}, 1.16, \textit{Gray code and parity}. \end{itemize} \levelup{}