| article html file updated | 8 February 2020 00:20 CET | Update | https://www.mdpi.com/2227-9040/5/1/9 |
| article html file updated | 23 September 2019 13:17 CEST | Update | N/A |
| article html file updated | 4 May 2019 09:16 CEST | Update | N/A |
| article html file updated | 29 March 2017 10:12 CEST | Update | N/A |
| article html file updated | 28 February 2017 05:14 CET | Original file | N/A |
| article xml uploaded. | 28 February 2017 05:13 CET | Original file | https://www.mdpi.com/2227-9040/5/1/9/xml |
| article pdf uploaded. | 28 February 2017 05:13 CET | Updated version of record | https://www.mdpi.com/2227-9040/5/1/9/pdf |
| article pdf uploaded. | 26 February 2017 10:44 CET | Version of Record | https://www.mdpi.com/2227-9040/5/1/9/pdf-vor |
