  Recently it has been shown that the spinnless one particle quantum mechanics
can be obtained in the framework of entirely classical subquantum kinetics. In
the present paper we argue that, within the same scheme and without any extra
assumption, it is possible to obtain both the non relativistic quantum
mechanics with spin, in the presence of an arbitrary external electromagnetic
field, as well as the nonlinear quantum mechanics.
  Pacs: 03.65.Ta, 05.20.Dd
  KEY WORDS: monads, subquantum physics, quantum potential, foundations of
quantum mechanics
