THE QUASIPROBABILITY OPERATOR OF POSITIONS AND MOMENTA IN QUANTUM MECHANICS Статья Zaparovannyi Yu.I., Kuryshkin V.V., Lyabis I.A. Soviet Physics Journal. Kluwer Academic Publishers-Plenum Publishers. Том 21. 1978. С. 336-339
THE CORRESPONDENCE PRINCIPLE BETWEEN CLASSICAL AND QUANTUM QUANTITIES Статья Zaparovannyi Yu.I. Soviet Physics Journal. Kluwer Academic Publishers-Plenum Publishers. Том 17. 1974. С. 762-766