4804 20200218134330.0 10.1051/0004-6361/201834597 DOI SCART-2020-0070 Koubský, P. Properties and nature of Be stars. 31. The binary nature, light variability, physical elements, and emission-line changes of HD 81357 2019 NO binaries: close binaries: spectroscopic stars: emission-line Be stars: fundamental parameters stars: individual: HD 81357 Astrophysics - Solar and Stellar Astrophysics Harmanec, P. Brož, M. Kotková, L. Yang, S. Božić, H. Sudar, D. Frémat, Y. Korčáková, D. Votruba, V. Škoda, P. Šlechta, M. Ruždjak, D. Astronomy & Astrophysics 629 2019 A105 (14pp) yves.fremat@observatoire.be https://ui.adsabs.harvard.edu/abs/2019A%26A...629A.105K/abstract published in REFERD