I would like to suggest a restriction on papers published in European Physical Journal C to letters and large collaboration experiments. The level and importance of the Journal is at most equivalent to the Physical Review D whose regular articles are not included in the count. The criteria for acceptance in Eur. J. Phys. C is

"describe original work or provide details of original work previously published in a Letter article. There is no general limitation of the overall size nor of the number of figures, nor of the level of details considered to be necessary"

While Phys. Review D

"Present important and novel physics, make a significant contribution in a specific research area and generate interest for PRD's readers, represent an authoritative and substantive addition to the body of literature, explore the subject matter comprehensively and thoroughly"

Clearly for regular articles the latter is more demanding.