| article html file updated | 8 February 2020 03:16 CET | Update | https://www.mdpi.com/2413-8851/1/2/12 |
| article html file updated | 24 September 2019 06:04 CEST | Update | N/A |
| article html file updated | 4 May 2019 02:48 CEST | Update | N/A |
| article html file updated | 11 April 2017 06:47 CEST | Original file | N/A |
| article xml uploaded. | 11 April 2017 06:45 CEST | Original file | https://www.mdpi.com/2413-8851/1/2/12/xml |
| article pdf uploaded. | 11 April 2017 06:45 CEST | Updated version of record | https://www.mdpi.com/2413-8851/1/2/12/pdf |
| article pdf uploaded. | 10 April 2017 13:00 CEST | Version of Record | https://www.mdpi.com/2413-8851/1/2/12/pdf-vor |
