\Bibitem{Sht87} \by A.~S.~Shtern \paper Exceptional Jordan pairs \jour Algebra Logika \yr 1987 \vol 26 \issue 6 \pages 756--766 \mathnet{http://mi.mathnet.ru/al2001} \mathscinet{https://mathscinet.ams.org/mathscinet-getitem?mr=988943}