L. He

The Size Distribution of Dust toward HD 210121 as Determined from Extinction

M. Wolff, D. Whittet, W. Roberge, 2000 .

Atomic and Molecular Interstellar Absorption Lines toward the High Galactic Latitude Stars HD 141569 and HD 157841 at Ultra-High Resolution

M. Barlow, I. Crawford, J. Blades, 1998, astro-ph/9803342.