| article html file updated | 9 February 2020 01:37 CET | Update | https://www.mdpi.com/2226-4787/6/1/2 |
| article html file updated | 29 September 2019 14:05 CEST | Update | N/A |
| article html file updated | 2 May 2019 05:14 CEST | Update | N/A |
| article html file updated | 18 April 2019 03:17 CEST | Update | N/A |
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| article html file updated | 27 March 2018 14:59 CEST | Update | N/A |
| article html file updated | 31 December 2017 08:59 CET | Original file | N/A |
| article xml uploaded. | 31 December 2017 08:57 CET | Update | https://www.mdpi.com/2226-4787/6/1/2/xml |
| article xml uploaded. | 31 December 2017 08:57 CET | Original file | N/A |
| article pdf uploaded. | 31 December 2017 08:57 CET | Version of Record | https://www.mdpi.com/2226-4787/6/1/2/pdf |
