“…the neutral K-meson or B-meson system, have turned out to be very suitable to discuss various quantum foundation issues as e.g. quantum erasing and marking procedures [2,3,4,5] or Bell inequalities [6,7,8,9,10,11,12] or for testing decoherence or entanglement in the system [13,14,15,16,17,18,19] or Bohr's complementary relation [20] or possible C PT violation effects [21,22,23].…”