Source Publication (e.g., journal title)
IT SHOULD BE EASY to determine the exact number of scholarly journals that are available online. Surprisingly, it is a challenge. Even how many scholarly journals are published in print isn't easy to calculate. Coming up with these numbers is a tale that information specialists will appreciate.
Tenopir, Carol, "Online Scholarly Journals: How Many?" (2004). School of Information Sciences -- Faculty Publications and Other Works.