Challenges - Open Access and Article Processing Charge (APC)
All articles published in Challenges (ISSN 2078-1547) are published in full open access. In order to provide free access to readers, and to cover the costs of peer review, copyediting, typesetting, long-term archiving, and journal management, an article processing charge (APC) of 1000 CHF (Swiss Francs) applies to papers accepted after peer review. In addition to Swiss Francs (CHF), we also accept payment in Euros (EUR), US Dollars (USD) or British Pound Sterling (GBP).
Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions. Note that many national and private research funding organizations and universities explicitly cover APCs for articles resulting from funded research projects. Discounts are also available for authors from institutes which participate in MDPI's Institutional Open Access Program (IOAP).