| article html file updated | 7 February 2020 06:47 CET | Update | https://www.mdpi.com/2073-4352/6/4/38 |
| article html file updated | 5 May 2019 19:39 CEST | Update | - |
| article html file updated | 27 March 2019 00:58 CET | Update | - |
| article html file updated | 27 April 2016 11:04 CEST | Update | - |
| article html file updated | 2 April 2016 08:35 CEST | Original file | - |
| article xml uploaded. | 2 April 2016 08:34 CEST | Original file | https://www.mdpi.com/2073-4352/6/4/38/xml |
| article pdf uploaded. | 2 April 2016 08:34 CEST | Version of Record | https://www.mdpi.com/2073-4352/6/4/38/pdf |
