  We discuss the Kirkwood-Rihaczek phase space distribution and analyze a whole
new class of quasi-distributions connected with this function. All these
functions have the correct marginals. We construct a coherent state
representation of such functions, discuss which operator ordering corresponds
to the Kirkwood-Rihaczek distribution and their generalizations, and show how
such states are connected to squeezed states. Quantum interference in the
Kirkwood-Rihaczek representation is discussed.
