`Circular type' quantum key distribution
`Classical' quantum states
`Lazy' quantum ensembles
`Plausibilities of plausibilities': an approach through circumstances
`Quantum probabilities' as context depending probabilities
`What is a Thing?': Topos Theory in the Foundations of Physics
``Classical'' Propagator and Path Integral in the Probability Representation of Quantum Mechanics
``Incerto tempore, incertisque loci'': Can we compute the exact time at which a quantum measurement happens?
``Interaction--free'' interaction: entangling evolution via quantum Zeno effect
``Plug and play'' systems for quantum cryptography
``Weighing'' a closed system and the time-energy uncertainty principle