| article html file updated | 6 February 2020 23:21 CET | Update | https://www.mdpi.com/2073-8994/7/4/1768 |
| article html file updated | 6 May 2019 10:12 CEST | Update | - |
| article html file updated | 26 March 2019 11:48 CET | Update | - |
| article html file updated | 28 October 2015 11:04 CET | Original file | - |
| article xml file uploaded | 28 October 2015 11:04 CET | Original file | https://www.mdpi.com/2073-8994/7/4/1768/xml |
| article pdf uploaded. | 29 September 2015 15:09 CEST | Version of Record | https://www.mdpi.com/2073-8994/7/4/1768/pdf |
