| article html file updated | 7 February 2020 06:52 CET | Update | https://www.mdpi.com/2076-0787/5/2/20 |
| article html file updated | 21 September 2019 14:32 CEST | Update | N/A |
| article html file updated | 5 May 2019 19:29 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:07 CET | Update | N/A |
| article html file updated | 6 April 2016 11:13 CEST | Original file | N/A |
| article xml uploaded. | 6 April 2016 11:12 CEST | Original file | https://www.mdpi.com/2076-0787/5/2/20/xml |
| article pdf uploaded. | 6 April 2016 11:12 CEST | Version of Record | https://www.mdpi.com/2076-0787/5/2/20/pdf |
