| article html file updated | 8 February 2020 02:04 CET | Update | https://www.mdpi.com/2077-0375/7/2/18 |
| article html file updated | 23 September 2019 23:19 CEST | Update | - |
| article html file updated | 4 May 2019 05:24 CEST | Update | - |
| article html file updated | 29 June 2017 11:39 CEST | Update | - |
| article html file updated | 27 March 2017 05:27 CEST | Update | - |
| article html file updated | 23 March 2017 11:40 CET | Original file | - |
| article xml uploaded. | 23 March 2017 11:39 CET | Original file | https://www.mdpi.com/2077-0375/7/2/18/xml |
| article pdf uploaded. | 23 March 2017 11:39 CET | Version of Record | https://www.mdpi.com/2077-0375/7/2/18/pdf |
