| article html file updated | 7 February 2020 03:02 CET | Update | https://www.mdpi.com/2076-0817/5/1/2 |
| article html file updated | 6 May 2019 03:20 CEST | Update | N/A |
| article html file updated | 26 March 2019 17:44 CET | Update | N/A |
| article html file updated | 29 March 2016 07:18 CEST | Original file | N/A |
| article pdf uploaded. | 4 January 2016 14:58 CET | Version of Record | https://www.mdpi.com/2076-0817/5/1/2/pdf |
| article xml uploaded. | 4 January 2016 14:58 CET | Original file | https://www.mdpi.com/2076-0817/5/1/2/xml |
