With Slobodan Simic, Messina, 2003.
Enzo Li Marzi and Slobodan Simic, Combinatorics 2004.
Greenwich, 2005.
7th Workshop on Combinatorics, Messina, 2007.
7th Workshop on Combinatorics, Reggio Calabria, 2007.
With Arnold Neumaier, Bled 2007.
With Irene Sciriha, Bled 2007.
With B. Mohar, R. Brualdi, and S. Kirkland, SGT in Rio 2008.
With Vilmar Trevisan, SGT in Rio 2008.
With J. Leydold and S. Cioaba, SGT in Rio 2008.
With Slobodan Simic, Sicily, 2010.
Group Photo, CACNA 2014.
With Ali Reza Ashrafi, CACNA 2014.
(Slovenian) Group Photo, 13th Serbian Mathematical Congress.
With M. Buratti and K. Kutnar, Koper, 2015.
Enzo Li Marzi and Slobodan Simic, Sicily, 2015.
Family picture, Scilla, 2016.
With Wilfried Imrich, GTACC10 2016.
Group Photo, GTACC10 2016.
Group Photo, Napoli, 2018.
With Sebi Cioaba, Maradona Stadium, 2018.
With Sebi Cioaba and Alfredo Donno, Napoli, 2018.
Special Session on SGT, Group Photo, Bled 2019.
With Edwin van Dam, Bled 2019.
With Z. Stanic, M. Andelic, and M. Brunetti, Bled 2019.
Group Photo, Bled 2019.
With M. Brunetti, C. Dalfo, and J.F. Wang, Bled 2019.
With Nate Reff, Pompei, 2019.
Group Photo, Aveiro 2019.
With Richard Brualdi, ILAS 2019.
Group Photo, ILAS 2019.
Group Photo, ILAS 2019.
With Jack Koolen and Sebi Cioaba, ILAS 2019.
With Vilmar Trevisan, Etna, 2020
Group Photo, ILAS 2022.