Every reference with a DOI in the deposited reference list resolved to a known
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The 6 references without a DOI — listed, not checked
no DOI — not checkedN. E. Egarmin, ?Vibrations of cantilever shells of revolution subjected to external vibration,? Summary of Documents of the All-Union Conference ?Wave and Vibration Processes in Machine Construction,? Gorky (1989), p. 92.
no DOI — not checkedA. V. Zbrutskii, S. A. Sarapulov, and N. M. Lokot, ?Errors of a rigid-body wave gyroscope with parametric excitation of the resonator,? Dopov. Akad. Nauk Ukr. RSR Ser. A, No. 2, 32?35 (1990).
no DOI — not checkedA. H. Naife, Perturbation Methods [Russian translation], Mir, Moscow (1976).
no DOI — not checkedM. A. Pavlovskii, S. A. Sarapulov, and S. P. Kisilenko, ?Condition of dynamic symmetry of a nonideal hemispherical shell with excitation of the free-edge mode,? Prikl. Mekh.,25, No. 9, 102?108 (1989).
no DOI — not checkedS. A. Sarapulov, S. P. Kisilenko, and A. M. Pavlovskii, ?Effect of longitudinal vibration on the dynamic characteristics of a rigid-body wave gyroscope,? Izv. Vyssh. Uchebn. Zaved. Priborostr.,33, No. 1, 48?53 (1990).
no DOI — not checkedW. B. Scott, ?Delco makes low-cost gyro prototype,? Aviat. Week,25, 64?72 (1982).
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