1: Introduction; C. Garola, A. Rossi. 2: On the Axioms of Probability; L. Accardi. 3: Three Quantum Theories of Measurement; A. Afriat, F. Selleri. 4: Characterization and Deduction of Bell-Type Inequalities; E. Beltrametti, C. del Noce, M. J. Maczinski. 5: The Search for Quantum Reality; S. Bergia, V. Fano. 6: Macrorealism, Non-Invasivity and Quantum Mechanics; T. Calarco, R. Onofrio. 7: Planck's Theory (1898-1906) and the Birth of Quantum Physics; P. Campogalliani. 8: An Analogue of the Tunnel Effect in Classical Electrodynamics; A. Carati, L. Galgani, J. Sassarini. 9: A Note on Light Dispersion Formula and the Development of Modern Physics; B. Carazza, G. P. Guidetti, N. Robotti. 10: Quantum Mechanics, Objects and Objectivity; E. Castellani. 11: Toward a Logic of Unsharp Quantum Mechanics; G. Cattaneo, F. Laudisa. 12: Interpretative Remarks in Quantum Mechanics; G. Cattaneo, G. Nistico. 13: Kuhn's Interpretation of Boltzmann Statistical Heredity in Planck; P. Cerreta. 14: Macroscopic Quantum Coherence as a Test of Quantum Mechanics; L. Chiatti, M. Cini, M. Serva. 15: Exchangeability and Invariance: Classical Aspects of Quantum Correlation; D. Costantini, U. Garibaldi. 16: Einstein`s Life-Long Doubts on the Physical Foundations of the General Relativity and Unified Field Theories; S. D'Agostino. 17: Physical Interpretations of the Lukasiewicz Quantum Logical Connectives; M. Dalla Chiara, R. Giuntini. 18: Relativistic Quantum Mechanics and Path Integral for Klein-Gordon Equation; G. F. De Angelis, M. Serva. 19: Ontological Determinateness in Quantum Mechanics and Special Relativity; M. Dorato. 20: Dualism and Incompleteness of Quantum Mechanics. Towards New Consistent Theories; A. Drago. 21: Quantum Mechanics Reformulated by Means of Symmetries; A. Drago, A. Pirolo. 22: A Priori Schemes in Quantum Mechanics; V. Fano. 23: Among Quantum Mechanics, Wave Optics, and Charged-Particle Beam Transport: Toward a Possible Unified Formal Description; R. Fedele. 24: Questioning Nonlocality: An Operational Critique to Bell's Theorem; C. Garola. 25: Bell's Inequality for Trichotomic Observables; A. Garuccio, L. de Caro. 26: Quantum Mechanics and Nonlocality - The EPR Argument Reconsidered; G. C. Ghirardi, R. Grassi. 27: Some Remarks on Non-Separability; E. Giannetto. 28: Unsharp Orthoalgebras and Quantum MV Algebras; R. Giuntini. 29: Introduction to Nelson Stochastic Mechanics as a Model for Quantum Mechanics; F. Guerra. 30: The Fermi-Dirac Statistics: A Simultaneous Discovery; N. Guicciardini, G. Introzzi. 31: Are There Sub-Quantum Trajectories? The Bohmian Interpretation of Quantum Theory; G. Peruzzi. 32: Algebraic Structures and Observations: Quantales for a Noncommutative Logic-Theoretic Approach to Quantum Mechanics; M. Piazza. 33: Hermeneutics as a Conceptual Model for an Ontological Evaluation of Quantum Theory; A. Rebaglia. (Part contents).