Habibzadeh F, Yadollahie M. Journal weighted impact factor: A proposal. Journal of Informetrics 2008;2(2):164-72
The authors consider the sole impact factor not adequate enough to measure journal quality. Therefore they propose to improve the calculation of the journal impact factor by taking into account both the number of citations and a factor concerning the prestige of the citing journals relative to the cited journal.
This "weighted impact factor" could be a better scientometrics measure of journal quality.