In the interest of both authors and readers, starting with 2018, we introduced the online first policy. This aims to offer full access to the research results at the earliest date possible, thus reducing the time before submission and publication of a manuscript.
Manuscripts accepted for publication will be posted online as soon as they have the final proofread version prepared. Every manuscript will be assigned a DOI and will be available for reading and citation even before the date of the regular publication (be it June or December of a certain year).
Articles will carry their own online publication date (the month when it is uploaded on the website). After an online first article will be assigned to a regular issue, it will still preserve the online date of publication, but when cited authors will be able to refer to it using not only the DOI but also the volume/issue information and page numbers.
Articles published online first are considered the final version, which will be also their printed version. Thus authors are asked to carefully prepare their manuscripts, any subsequent content-related corrections not being allowed.