| article html file updated | 7 February 2020 21:34 CET | Update | https://www.mdpi.com/2075-4418/7/1/6 |
| article html file updated | 22 September 2019 22:00 CEST | Update | N/A |
| article html file updated | 4 May 2019 15:00 CEST | Update | N/A |
| article html file updated | 29 March 2017 10:37 CEST | Update | N/A |
| article html file updated | 17 January 2017 08:52 CET | Original file | N/A |
| article xml uploaded. | 17 January 2017 08:51 CET | Original file | https://www.mdpi.com/2075-4418/7/1/6/xml |
| article pdf uploaded. | 17 January 2017 08:51 CET | Version of Record | https://www.mdpi.com/2075-4418/7/1/6/pdf |
