| article html file updated | 8 February 2020 00:05 CET | Update | https://www.mdpi.com/2227-9067/4/2/14 |
| article html file updated | 23 September 2019 11:48 CEST | Update | N/A |
| article html file updated | 4 May 2019 09:51 CEST | Update | N/A |
| article html file updated | 2 March 2017 09:44 CET | Update | N/A |
| article html file updated | 23 February 2017 10:28 CET | Original file | N/A |
| article xml uploaded. | 23 February 2017 10:27 CET | Original file | https://www.mdpi.com/2227-9067/4/2/14/xml |
| article pdf uploaded. | 23 February 2017 10:27 CET | Version of Record | https://www.mdpi.com/2227-9067/4/2/14/pdf |
