| article html file updated | 7 February 2020 23:26 CET | Update | https://www.mdpi.com/2076-0817/6/1/7 |
| article html file updated | 23 September 2019 08:08 CEST | Update | N/A |
| article html file updated | 4 May 2019 11:11 CEST | Update | N/A |
| article html file updated | 30 March 2017 11:05 CEST | Update | N/A |
| article html file updated | 15 February 2017 10:02 CET | Original file | N/A |
| article xml uploaded. | 15 February 2017 10:01 CET | Original file | https://www.mdpi.com/2076-0817/6/1/7/xml |
| article pdf uploaded. | 15 February 2017 10:01 CET | Version of Record | https://www.mdpi.com/2076-0817/6/1/7/pdf |
