@mjoyce Just wanted to ask one more question,
I tried to search The Keepers Registry for the content harvested from the journal by PKP PLN:
But got this message: This item is linked to one or more e-journal records, but is not reported as archived by any of our Keepers. However, the last dataset from PKP PLN was received 01 May 2017 and should have had our content. What could be the reason?