| article html file updated | 7 February 2020 23:56 CET | Update | https://www.mdpi.com/2073-4352/7/2/60 |
| article html file updated | 23 September 2019 10:55 CEST | Update | - |
| article html file updated | 4 May 2019 10:11 CEST | Update | - |
| article html file updated | 2 March 2017 03:49 CET | Update | - |
| article html file updated | 21 February 2017 14:31 CET | Original file | - |
| article xml uploaded. | 21 February 2017 14:30 CET | Original file | https://www.mdpi.com/2073-4352/7/2/60/xml |
| article pdf uploaded. | 21 February 2017 14:30 CET | Version of Record | https://www.mdpi.com/2073-4352/7/2/60/pdf |
