| article html file updated | 9 February 2020 17:31 CET | Update | https://www.mdpi.com/2075-4663/6/2/43 |
| article html file updated | 3 October 2019 13:44 CEST | Update | N/A |
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| article html file updated | 25 June 2018 12:41 CEST | Update | N/A |
| article pdf uploaded. | 14 May 2018 17:51 CEST | Updated version of record | https://www.mdpi.com/2075-4663/6/2/43/pdf |
| article html file updated | 14 May 2018 17:49 CEST | Original file | N/A |
| article xml uploaded. | 14 May 2018 17:47 CEST | Original file | https://www.mdpi.com/2075-4663/6/2/43/xml |
