| article html file updated | 6 February 2020 22:31 CET | Update | https://www.mdpi.com/2076-0787/4/3/369 |
| article html file updated | 21 September 2019 02:59 CEST | Update | N/A |
| article html file updated | 6 May 2019 11:55 CEST | Update | N/A |
| article html file updated | 26 March 2019 10:11 CET | Original file | N/A |
| article pdf uploaded. | 7 September 2015 15:48 CEST | Version of Record | https://www.mdpi.com/2076-0787/4/3/369/pdf |
