| article html file updated | 7 February 2020 20:44 CET | Update | https://www.mdpi.com/2227-9040/5/1/2 |
| article html file updated | 22 September 2019 17:38 CEST | Update | N/A |
| article html file updated | 4 May 2019 16:54 CEST | Update | N/A |
| article html file updated | 29 March 2017 10:11 CEST | Update | N/A |
| article html file updated | 4 January 2017 08:43 CET | Original file | N/A |
| article xml uploaded. | 4 January 2017 08:42 CET | Original file | https://www.mdpi.com/2227-9040/5/1/2/xml |
| article pdf uploaded. | 4 January 2017 08:42 CET | Version of Record | https://www.mdpi.com/2227-9040/5/1/2/pdf |
