| article html file updated | 8 February 2020 05:02 CET | Update | https://www.mdpi.com/2218-273X/7/2/39 |
| article html file updated | 24 September 2019 15:40 CEST | Update | - |
| article html file updated | 3 May 2019 23:32 CEST | Update | - |
| article html file updated | 28 June 2017 12:42 CEST | Update | - |
| article html file updated | 23 May 2017 03:39 CEST | Update | - |
| article html file updated | 4 May 2017 12:44 CEST | Original file | - |
| article xml uploaded. | 4 May 2017 12:42 CEST | Original file | https://www.mdpi.com/2218-273X/7/2/39/xml |
| article pdf uploaded. | 4 May 2017 12:42 CEST | Version of Record | https://www.mdpi.com/2218-273X/7/2/39/pdf |
