| article html file updated | 7 February 2020 22:11 CET | Update | https://www.mdpi.com/2073-4344/7/2/37 |
| article html file updated | 23 September 2019 01:20 CEST | Update | - |
| article html file updated | 4 May 2019 13:40 CEST | Update | - |
| article html file updated | 1 March 2017 07:45 CET | Update | - |
| article html file updated | 25 January 2017 08:25 CET | Original file | - |
| article xml uploaded. | 25 January 2017 08:24 CET | Original file | https://www.mdpi.com/2073-4344/7/2/37/xml |
| article pdf uploaded. | 25 January 2017 08:24 CET | Version of Record | https://www.mdpi.com/2073-4344/7/2/37/pdf |
