1 “... are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles...”

2 “... are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles...”

3 “... journal Mathematics. These articles cover a wide range of topics related to swarm intelligence algorithms...”

4 “... "Computational Optimizations for Machine Learning" of the MDPI journal Mathematics, which cover a wide range...”

5 “..., and maintain CPS. This book is a result of a journal Special Issue, with the objective of providing a forum...”

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