| article html file updated | 9 February 2020 01:52 CET | Update | https://www.mdpi.com/2076-0787/7/1/2 |
| article html file updated | 2 May 2019 04:41 CEST | Update | N/A |
| article html file updated | 18 April 2019 02:45 CEST | Update | N/A |
| article html file updated | 28 March 2019 12:48 CET | Update | N/A |
| article html file updated | 11 January 2018 07:20 CET | Update | N/A |
| article xml uploaded. | 11 January 2018 07:19 CET | Update | https://www.mdpi.com/2076-0787/7/1/2/xml |
| article pdf uploaded. | 11 January 2018 07:19 CET | Updated version of record | https://www.mdpi.com/2076-0787/7/1/2/pdf |
| article html file updated | 3 January 2018 12:50 CET | Original file | N/A |
| article pdf uploaded. | 3 January 2018 12:49 CET | Version of Record | https://www.mdpi.com/2076-0787/7/1/2/pdf-vor |
