| article html file updated | 7 February 2020 17:15 CET | Update | https://www.mdpi.com/2227-9067/3/4/22 |
| article html file updated | 22 September 2019 04:18 CEST | Update | N/A |
| article html file updated | 4 May 2019 23:58 CEST | Update | N/A |
| article html file updated | 27 December 2016 02:26 CET | Update | N/A |
| article html file updated | 31 October 2016 09:22 CET | Original file | N/A |
| article xml uploaded. | 31 October 2016 09:20 CET | Original file | https://www.mdpi.com/2227-9067/3/4/22/xml |
| article pdf uploaded. | 31 October 2016 09:20 CET | Version of Record | https://www.mdpi.com/2227-9067/3/4/22/pdf |
