| article html file updated | 8 February 2020 02:59 CET | Update | https://www.mdpi.com/2226-4787/5/2/20 |
| article html file updated | 24 September 2019 04:26 CEST | Update | N/A |
| article html file updated | 4 May 2019 03:24 CEST | Update | N/A |
| article html file updated | 29 June 2017 12:45 CEST | Update | N/A |
| article html file updated | 6 April 2017 04:29 CEST | Original file | N/A |
| article xml uploaded. | 6 April 2017 04:28 CEST | Original file | https://www.mdpi.com/2226-4787/5/2/20/xml |
| article pdf uploaded. | 6 April 2017 04:28 CEST | Version of Record | https://www.mdpi.com/2226-4787/5/2/20/pdf |
