| article html file updated | 7 February 2020 21:52 CET | Update | https://www.mdpi.com/2226-4787/5/1/4 |
| article html file updated | 22 September 2019 23:39 CEST | Update | N/A |
| article html file updated | 4 May 2019 14:17 CEST | Update | N/A |
| article html file updated | 28 March 2017 11:53 CEST | Update | N/A |
| article html file updated | 20 January 2017 12:44 CET | Original file | N/A |
| article xml uploaded. | 20 January 2017 12:43 CET | Original file | https://www.mdpi.com/2226-4787/5/1/4/xml |
| article pdf uploaded. | 20 January 2017 12:43 CET | Version of Record | https://www.mdpi.com/2226-4787/5/1/4/pdf |
