| article html file updated | 6 February 2020 02:51 CET | Update | https://www.mdpi.com/2073-4336/4/3/329 |
| article html file updated | 19 September 2019 22:09 CEST | Update | - |
| article html file updated | 8 May 2019 03:34 CEST | Update | - |
| article html file updated | 21 March 2019 00:23 CET | Update | - |
| article html file updated | 17 December 2016 07:52 CET | Original file | - |
| article pdf uploaded. | 27 June 2013 09:34 CEST | Version of Record | https://www.mdpi.com/2073-4336/4/3/329/pdf |
