| article html file updated | 8 February 2020 05:57 CET | Update | https://www.mdpi.com/2413-8851/1/2/18 |
| article html file updated | 24 September 2019 20:25 CEST | Update | N/A |
| article html file updated | 3 May 2019 21:52 CEST | Update | N/A |
| article html file updated | 23 May 2017 04:18 CEST | Update | N/A |
| article html file updated | 16 May 2017 11:55 CEST | Original file | N/A |
| article xml uploaded. | 16 May 2017 11:54 CEST | Original file | https://www.mdpi.com/2413-8851/1/2/18/xml |
| article pdf uploaded. | 16 May 2017 11:54 CEST | Version of Record | https://www.mdpi.com/2413-8851/1/2/18/pdf |
