| article html file updated | 7 February 2020 23:24 CET | Update | https://www.mdpi.com/2073-4352/7/2/39 |
| article html file updated | 23 September 2019 07:59 CEST | Update | N/A |
| article html file updated | 4 May 2019 11:14 CEST | Update | N/A |
| article html file updated | 2 March 2017 03:41 CET | Update | N/A |
| article html file updated | 15 February 2017 04:55 CET | Original file | N/A |
| article xml uploaded. | 15 February 2017 04:54 CET | Original file | https://www.mdpi.com/2073-4352/7/2/39/xml |
| article pdf uploaded. | 15 February 2017 04:54 CET | Version of Record | https://www.mdpi.com/2073-4352/7/2/39/pdf |
