| article html file updated | 7 February 2020 07:00 CET | Update | https://www.mdpi.com/2073-4441/8/4/140 |
| article html file updated | 5 May 2019 19:14 CEST | Update | - |
| article html file updated | 27 March 2019 01:21 CET | Update | - |
| article html file updated | 28 April 2016 12:22 CEST | Update | - |
| article html file updated | 8 April 2016 14:40 CEST | Original file | - |
| article xml uploaded. | 8 April 2016 14:39 CEST | Original file | https://www.mdpi.com/2073-4441/8/4/140/xml |
| article pdf uploaded. | 8 April 2016 14:39 CEST | Version of Record | https://www.mdpi.com/2073-4441/8/4/140/pdf |
