L. Makarlimanov, ON THE HYPERSURFACE X-4 OR A C-3-LIKE THREEFOLD WHICH IS NOT C-3(X(2)Y+Z(2)+T(3)=0 IN C), Israel Journal of Mathematics, 96, 1996, pp. 419-429
In this note it will. be proved that the threefold in C-4 which is giv
en by x + x(2)y + z(2) + t(3) = 0 is not isomorphic to C-3. Here C is
the field of complex numbers.