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| article html file updated | 30 September 2019 19:00 CEST | Update | - |
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| article xml uploaded. | 19 February 2018 15:10 CET | Update | https://www.mdpi.com/2227-7080/6/1/24/xml |
| article pdf uploaded. | 19 February 2018 15:10 CET | Updated version of record | https://www.mdpi.com/2227-7080/6/1/24/pdf |
| article html file updated | 13 February 2018 17:47 CET | Original file | - |
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