title: The meaning of the 'impact factor' in the case of an open-access journal.
abstract: The dominant model of journal evaluation emerged at the time when there were no open-access journals, and nobody has assessed yet whether this model is able to cope with this modern reality. This commentary attempts to fill the gaps in the common understanding of the role that 'impact factor' should play in evaluation of open-access journals.
authors.affiliation: Institute of Atmospheric Physics, Russian Academy of Sciences, Pyzhevsky 3, Moscow, Russia. a_georgii@hotmail.com.
authors.forename: Georgii A
authors.initials: GA
authors.lastname: Alexandrov