| article html file updated | 8 February 2020 05:27 CET | Update | https://www.mdpi.com/2413-8851/1/2/15 |
| article html file updated | 24 September 2019 17:45 CEST | Update | - |
| article html file updated | 3 May 2019 22:48 CEST | Update | - |
| article html file updated | 23 May 2017 03:56 CEST | Update | - |
| article html file updated | 10 May 2017 11:35 CEST | Update | - |
| article xml uploaded. | 10 May 2017 11:33 CEST | Update | https://www.mdpi.com/2413-8851/1/2/15/xml |
| article pdf uploaded. | 10 May 2017 11:33 CEST | Updated version of record | https://www.mdpi.com/2413-8851/1/2/15/pdf |
| article html file updated | 9 May 2017 15:50 CEST | Original file | - |
| article pdf uploaded. | 9 May 2017 15:49 CEST | Version of Record | https://www.mdpi.com/2413-8851/1/2/15/pdf-vor |
