| article html file updated | 7 February 2020 22:43 CET | Update | https://www.mdpi.com/2076-0760/6/1/13 |
| article html file updated | 23 September 2019 04:14 CEST | Update | N/A |
| article html file updated | 4 May 2019 12:36 CEST | Update | N/A |
| article html file updated | 7 February 2017 05:02 CET | Original file | N/A |
| article pdf uploaded. | 6 February 2017 10:06 CET | Version of Record | https://www.mdpi.com/2076-0760/6/1/13/pdf |
