| article html file updated | 7 February 2020 02:56 CET | Update | https://www.mdpi.com/2073-4360/8/1/7 |
| article html file updated | 21 September 2019 08:59 CEST | Update | - |
| article html file updated | 6 May 2019 03:31 CEST | Update | - |
| article html file updated | 26 March 2019 17:34 CET | Update | - |
| article html file updated | 15 March 2019 08:08 CET | Original file | - |
| article pdf uploaded. | 4 January 2016 10:54 CET | Updated version of record | https://www.mdpi.com/2073-4360/8/1/7/pdf |
| article pdf uploaded. | 31 December 2015 14:40 CET | Version of Record | https://www.mdpi.com/2073-4360/8/1/7/pdf-vor |
| article xml uploaded. | 31 December 2015 14:40 CET | Original file | https://www.mdpi.com/2073-4360/8/1/7/xml |
