| article html file updated | 7 February 2020 01:54 CET | Update | https://www.mdpi.com/2073-4425/6/4/1300 |
| article html file updated | 6 May 2019 05:40 CEST | Update | N/A |
| article html file updated | 26 March 2019 15:56 CET | Original file | N/A |
| article pdf uploaded. | 8 December 2015 09:56 CET | Version of Record | https://www.mdpi.com/2073-4425/6/4/1300/pdf |
