1. S. S. Sannikov, “On States with Complex Angular Momentum in Quantum Mechanics,” Yad. Fiz. 4, 896–904 (1966) [Sov. J. Nucl. Phys. 4, 638 (1966)].
2. S. S. Sannikov, “On Noncompact Symmetry Group of Oscillator,” Zh. Eksp. Teor. Fiz. 49, 1913–1922 (1965) [Sov. Phys. JETP 22, 1306 (1965)].
3. S. S. Sannikov-Proskuryakov, “Dynamical Structure of Space-time Discontinuum and Spin 1/4,” Nucl. Phys. B Proc. Suppl. 102–103, 328–333 (2001).
4. S. S. Sannikov-Proskuryakov, “Non-Neumannian Representation of Rotation Group (to the Ether Theory) 1,” Spacetime and Substance 6, No 1 (26) 1–7 (2005).
5. S. S. Sannikov-Proskuryakov, “Non-Neumannian Representation of Rotation Group (to the Ether Theory) 2,” Spacetime and Substance 6, No 1 (26) 21–27 (2005).