As you all know, the deadline for the submission of papers for the Proceedings has passed.
We would like to thank all those who have already submitted the papers and respected deadline.
However, many of the colleagues wrote to us asking for the extension of the deadline, due to their professional engagements.
Therefore, we have decided to extend the deadline until September 30th, 2019.
Please note that we have taken into account holidays, excavations during this period, as well as many conferences and exams happening in September, when choosing this date.
Please, bare in mind that this is the final deadline and that there will be no further extensions!
We wish you all an interesting, fruitful and sunny summer!
The Editorial Board