| article html file updated | 7 February 2020 23:47 CET | Update | https://www.mdpi.com/2073-4441/9/2/139 |
| article html file updated | 23 September 2019 10:09 CEST | Update | N/A |
| article html file updated | 4 May 2019 10:28 CEST | Update | N/A |
| article html file updated | 1 March 2017 08:11 CET | Update | N/A |
| article html file updated | 22 February 2017 08:38 CET | Original file | N/A |
| article xml uploaded. | 22 February 2017 08:37 CET | Original file | https://www.mdpi.com/2073-4441/9/2/139/xml |
| article pdf uploaded. | 22 February 2017 08:37 CET | Updated version of record | https://www.mdpi.com/2073-4441/9/2/139/pdf |
| article pdf uploaded. | 20 February 2017 10:18 CET | Version of Record | https://www.mdpi.com/2073-4441/9/2/139/pdf-vor |
