AUTHOR=Gumpenberger Christian , Hölbling Lothar , Gorraiz Juan Ignacio TITLE=On the Issues of a “Corresponding Author” Field-Based Monitoring Approach for Gold Open Access Publications and Derivative Cost Calculations JOURNAL=Frontiers in Research Metrics and Analytics VOLUME=3 YEAR=2018 URL=https://www.frontiersin.org/journals/research-metrics-and-analytics/articles/10.3389/frma.2018.00001 DOI=10.3389/frma.2018.00001 ISSN=2504-0537