\Bibitem{1} \paper Aleksandr Petrovich Mikhailov (on his 60th birthday) \jour Mat. Model. \yr 2007 \vol 19 \issue 4 \pages 127--128 \mathnet{http://mi.mathnet.ru/mm953} \mathscinet{https://mathscinet.ams.org/mathscinet-getitem?mr=2341640}