| article html file updated | 7 February 2020 23:44 CET | Update | https://www.mdpi.com/2073-4352/7/2/57 |
| article html file updated | 23 September 2019 09:49 CEST | Update | N/A |
| article html file updated | 4 May 2019 10:35 CEST | Update | N/A |
| article html file updated | 2 March 2017 03:49 CET | Update | N/A |
| article html file updated | 18 February 2017 10:14 CET | Original file | N/A |
| article xml uploaded. | 18 February 2017 10:12 CET | Original file | https://www.mdpi.com/2073-4352/7/2/57/xml |
| article pdf uploaded. | 18 February 2017 10:12 CET | Version of Record | https://www.mdpi.com/2073-4352/7/2/57/pdf |
