  Complex fission phenomena are studied in a unified way. Very general
reflection asymmetrical equilibrium (saddle point) nuclear shapes are obtained
by solving an integro-differential equation without being necessary to specify
a certain parametrization. The mass asymmetry in binary cold fission of Th and
U isotopes is explained as the result of adding a phenomenological shell
correction to the liquid drop model deformation energy. Applications to binary,
ternary, and quaternary fission are outlined.
