| article html file updated | 7 February 2020 21:39 CET | Update | https://www.mdpi.com/2073-4441/9/1/56 |
| article html file updated | 22 September 2019 22:25 CEST | Update | N/A |
| article html file updated | 4 May 2019 14:48 CEST | Update | N/A |
| article html file updated | 7 February 2017 04:34 CET | Update | N/A |
| article html file updated | 17 January 2017 12:55 CET | Original file | N/A |
| article xml uploaded. | 17 January 2017 12:53 CET | Update | https://www.mdpi.com/2073-4441/9/1/56/xml |
| article xml uploaded. | 17 January 2017 12:53 CET | Original file | N/A |
| article pdf uploaded. | 17 January 2017 12:53 CET | Version of Record | https://www.mdpi.com/2073-4441/9/1/56/pdf |
