| article html file updated | 13 February 2020 15:08 CET | Update | https://www.mdpi.com/2227-9709/6/3/39 |
| article html file updated | 26 September 2019 17:35 CEST | Update | N/A |
| article html file updated | 4 September 2019 13:39 CEST | Original file | N/A |
| article pdf uploaded. | 4 September 2019 13:37 CEST | Version of Record | https://www.mdpi.com/2227-9709/6/3/39/pdf |
| article xml uploaded. | 4 September 2019 13:37 CEST | Update | https://www.mdpi.com/2227-9709/6/3/39/xml |
| article xml file uploaded | 4 September 2019 13:37 CEST | Original file | N/A |
