He I 10830 A line observations in compact H II regions
He I 10830 as a Probe of Winds in Accreting Young Stars
He I 10830-A observations of Seyfert 2 galaxies
He I absorption by Lyman-alpha clouds and low-redshift Lyman-alpha clouds
He I lambda 10830 observations of five Seyfert galaxies
He I lambda 4471 profiles in B stars: calculation with an improved line-broadening theory.
He I lambda 4922 profiles in B stars - Calculations with an improved line broadening theory
He I line emission and the helium abundance in cataclysmic variables
He I lines in B stars - Comparison of non-local thermodynamic equilibrium models with observations
He I lines in the spectra of QSOs and Seyfert galaxies
He II 4686 in eta Carinae: collapse of the wind-wind collision region during periastron passage
He II absorption and the sawtooth spectrum of the cosmic far-UV background
He II emission from solar flares
He II emission in extragalactic H II regions
He II emission in the Be star Phi Persei
He II lambda 4686 emission in the spectrum of HDE 226868 /Cygnus X-1/
He II Lyβ Gunn-Peterson Absorption: New HST Observations, and Theoretical Expectations
He II Raman Scattering in the Young Planetary Nebula IC 5117
He II Reionization and Sources of Metagalactic Ionization
He II Reionization and Sources of Metagalactic Ionization