The proceedings are available here:
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- 21th PBE (2023) ISSN 2695-0626
- 20th PBE (2022) ISSN 2695-0626
- 19th PBE (2021) ISSN 2695-0626
- 18th PBE (2020) ISSN 2695-0626
- 17th PBE (2019)
- 16th PBE (2018)
- 15th PBE (2017)
- 14th PBE (2016)
- 13th PBE (2015)
- 12th OBE (2014)
- 10th PBE (2013)
- 9th PBE (2012)
- 8th PBE (2011)