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1
Published 2019
Springer International Publishing
“..., Bulgaria, in October 2017. The 16 revised full papers presented were carefully reviewed and selected from...”
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2
Published 2021
Springer International Publishing
“..., in Sofia, Bulgaria, in December 2020.* The 18 full papers and 6 short papers presented were carefully...”
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3
Published 2017
Springer International Publishing
“..., Bulgaria, in November 2016. The 20 revised full papers presented were carefully reviewed and selected from...”