| article html file updated | 7 February 2020 07:05 CET | Update | https://www.mdpi.com/2073-4360/8/4/137 |
| article html file updated | 21 September 2019 14:53 CEST | Update | - |
| article html file updated | 5 May 2019 18:59 CEST | Update | - |
| article html file updated | 27 March 2019 01:32 CET | Update | - |
| article html file updated | 15 March 2019 12:06 CET | Update | - |
| article html file updated | 29 April 2016 09:55 CEST | Update | - |
| article html file updated | 11 April 2016 12:56 CEST | Original file | - |
| article xml uploaded. | 11 April 2016 12:55 CEST | Original file | https://www.mdpi.com/2073-4360/8/4/137/xml |
| article pdf uploaded. | 11 April 2016 12:55 CEST | Version of Record | https://www.mdpi.com/2073-4360/8/4/137/pdf |
