| article html file updated | 15 August 2026 00:07 CEST | Update | https://www.mdpi.com/2227-7390/6/4/52 |
| article html file updated | 9 February 2020 12:23 CET | Update | N/A |
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| article pdf uploaded. | 4 April 2018 13:19 CEST | Updated version of record | https://www.mdpi.com/2227-7390/6/4/52/pdf |
| article html file updated | 3 April 2018 17:39 CEST | Original file | N/A |
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