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Principal Component Analysis for Estimating Parameters of the L1287 Dense Core by Fitting Model Spectral Maps into Observed Ones L. E. PirogovP. M. Zemlyanukha OriginalPaper 26 February 2021 Pages: 82 - 94
Destruction of a Star during the Evolution of a Star + Supermassive Black Hole System A. V. FedorovaA. V. Tutukov OriginalPaper 26 February 2021 Pages: 95 - 109
Restrictions on the Parameters of Black Hole and Plasma in the Vicinity of the Source Sagittarius A* S. V. Chernov OriginalPaper 26 February 2021 Pages: 110 - 125
Variations in the Orbital Periods of Eclipsing Binaries RY Aqr, AK Vir, and AX Vul A. I. Khaliullina OriginalPaper 26 February 2021 Pages: 126 - 136
Relativistic Reductions in Distance Measurements between Spacecraft with Picometer Accuracy I. Yu. VlasovM. V. SazhinV. N. Sementsov OriginalPaper 26 February 2021 Pages: 137 - 152