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1. A new study of the spectroscopic binary 7 Vul with a Be star primary

2. Properties and nature of Be stars 31. The binary nature, light variability, physical elements, and emission-line changes of HD 81357

3. Long-term, orbital, and rapid variations of the Be star V923 Aql = HD 183656

4. Optically thin circumstellar medium in theβLyr A system

5. Yet Another Spectro-Interferometric Study of The Gas Distribution in The Enigmatic Semi-Detached BinaryβLyrae

6. A New Look into Putative Duplicity and Pulsations of the Be Star β CMi

7. ξ Tauri: a unique laboratory to study the dynamic interaction in a compact hierarchical quadruple system

8. Nominal values for selected solar and planetary quantities: IAU 2015 Resolution B3

9. COMMISSION 42: CLOSE BINARY STARS

10. Shaking the Pot of Modelling Tools: Some Open Problems in the Field

11. Physical properties ofβLyrae A and its opaque accretion disk

13. The circumbinary dusty disk around the hydrogen-deficient binary star $\mathsf{\upsilon}$ Sagittarii

14. COMMISSION 42: CLOSE BINARY STARS

15. Improved estimates of the physical properties of the O-star binary V1007 Sco = HD 152248 and notes on several other binaries in the NGC 6231 cluster

16. V379 Cephei: a quadruple system of two binaries

17. New findings supporting the presence of a thick disc and bipolar jets in the $\mathsf{\beta}$ Lyrae system

18. Properties and nature of Be stars

19. Apsidal motion in eccentric eclipsing binaries: CW Cephei, V478 Cygni, AG Persei, and IQ Persei

20. Properties and nature of Be stars

21. V379 Cep: a System of Two Binaries

22. New Findings Supporting the Presence of Several Distinct Structures of Circumstellar Matter in β Lyræ

23. Introduction & Overview to Symposium 240: Binary Stars as Critical Tools and Tests in Contemporary Astrophysics

24. Professor Mirek J. Plavec

25. Is the model of one-armed oscillations able to explain the long-termV/Rchanges of Be stars?

26. The new orbital elements and properties of $\vec{\varepsilon}$ Persei

27. The orbit of the close spectroscopic binaryεLup and the intrinsic variability of its early B-type components

28. Reliable elimination of telluric lines from stellar spectra

29. Disentangling component spectra of , a spectroscopic binary with a pulsating primary

30. Disentangling component spectra of , a spectroscopic binary with a pulsating primary

31. Apsidal motion in eccentric eclipsing binaries: V871 Aql, V345 Lac, V401 Lac and CR Sct

32. Properties and nature of Be stars

33. An improved ephemeris and physical elements of ER Vul

34. On the role of duplicity in the Be phenomenon

35. Properties and nature of Be stars

36. Improved model of the triple system V746 Cassiopeiae that has a bipolar magnetic field associated with the tertiary

38. Apsidal motion and light-time effect in eclipsing binaries HS Herculis and U Ophiuchi

39. Strange Among the Strange: The B-emission Star γ Cassiopeiæ

42. Properties and nature of Be stars 30. Reliable physical properties of a semi-detached B9.5e+G8III binary BR CMi = HD 61273 compared to those of other well studied semi-detached emission-line binaries

43. Revised physical elements of the astrophysically important O9.5+O9.5V eclipsing binary system Y Cyg

44. A new analysis of the radial velocity variations of the eclipsing and spectroscopic binary EN Lacertae

45. Commission 27: Variable Stars: (Les Etoiles Variables)

46. Gas-Dynamical Modelling of Circumstellar Matter in β Lyr A

47. Spectral and Light Variability of Be Star 60 Cygni

48. Photometric Solution of the O-type Eclipsing Binary V1007 Sco

49. UBV photometry of Be stars at Hvar: 1972–1990

50. V346 Centauri: Early-type eclipsing binary with apsidal motion and abrupt change of orbital period

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