Linking Service to Open Access Repositories. - Shigeki Sugita; Kunie Horikoshi; Masako Suzuki; Shin Kataoka; E. S. Hellman; Keiji Suzuki (D Lib Mag., 2007)

The Open-Factor: Toward Impact-Aligned Measures of Open-Access eBook Usage. - E. S. Hellman (J. Electron. Publ., 2019)