Three numbers issued for volume 6 (2010).
Volume 8 (2012) and 10 (2014) published in 3 numbers, the content of issue no. 2 for each of those volumes is in Czech. With volume 11 (2015), issues published Czech are no longer numbered within the main run; they carry the same volume designation, but individual issue numbers are followed by the letter "S". The content is original; that is, the content is not a Czech version of the English language issues.
Issued for Dec. 2017, published as combined issue: Volume 13, number 2/3.
Publication information for volume 14, number 3 (December 2018) erroneously states that title is issued biannually; since 2016, 3 regular numbers have been published each year, 2016-<2018>