| article html file updated | 7 February 2020 06:40 CET | Update | https://www.mdpi.com/2073-4352/6/4/34 |
| article html file updated | 5 May 2019 19:54 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:45 CET | Update | N/A |
| article html file updated | 27 April 2016 10:59 CEST | Update | N/A |
| article html file updated | 31 March 2016 09:23 CEST | Original file | N/A |
| article xml uploaded. | 31 March 2016 09:21 CEST | Original file | https://www.mdpi.com/2073-4352/6/4/34/xml |
| article pdf uploaded. | 31 March 2016 09:21 CEST | Version of Record | https://www.mdpi.com/2073-4352/6/4/34/pdf |
