. "Stars pre-main sequence"@en . "Herbig Ae/Be"@en . "Accretion disks"@en . "Sicilia-Aguilar" . "Stars late-type"@en . "Stars rotation"@en . "Astronomical instrumentation"@en . "Protoplanetary disks"@en . "Methods and techniques"@en . "Astrophysics - Earth and Planetary Astrophysics"@en . "Stars formation"@en . "Circumstellar matter"@en . "A. Sicilia-Aguilar" . "Accretion"@en . "Stars magnetic fields"@en . "Astrophysics - Solar and Stellar Astrophysics"@en . "1290"@en . . "A." . "Methods observational"@en . "Pre-main sequence stars"@en . <0000-0002-8421-0851> . . "Stars variables T Tauri"@en .