Laakso M, Björk B. Anatomy of open access publishing: a study of longitudinal development and internal structure. BMC Medicine 2012;10:124
This is the first study to provide comprehensive gold open access (OA) measurement for 2010 and 2011. Its primary aim was to measure the volume of scientific articles published in full immediate OA journals from 2000 to 2011, while observing longitudinal internal shifts in the structure of OA publishing concerning revenue models, publisher types and relative distribution among scientific disciplines. The secondary aim was to measure the share of OA articles of all journal articles.