| article html file updated | 9 February 2020 12:14 CET | Update | https://www.mdpi.com/2227-7102/8/2/45 |
| article html file updated | 2 October 2019 05:13 CEST | Update | - |
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| article html file updated | 27 June 2018 09:14 CEST | Update | - |
| article html file updated | 3 April 2018 13:24 CEST | Update | - |
| article html file updated | 2 April 2018 23:46 CEST | Original file | - |
| article xml uploaded. | 2 April 2018 15:22 CEST | Original file | https://www.mdpi.com/2227-7102/8/2/45/xml |
| article pdf uploaded. | 2 April 2018 15:22 CEST | Version of Record | https://www.mdpi.com/2227-7102/8/2/45/pdf |
