| article html file updated | 9 February 2020 13:10 CET | Update | https://www.mdpi.com/2076-0752/7/2/15 |
| article html file updated | 1 May 2019 04:46 CEST | Update | - |
| article html file updated | 17 April 2019 05:02 CEST | Update | - |
| article html file updated | 29 March 2019 14:12 CET | Update | - |
| article html file updated | 27 June 2018 19:43 CEST | Update | - |
| article html file updated | 10 April 2018 10:50 CEST | Original file | - |
| article xml uploaded. | 10 April 2018 10:49 CEST | Original file | https://www.mdpi.com/2076-0752/7/2/15/xml |
| article pdf uploaded. | 10 April 2018 10:49 CEST | Version of Record | https://www.mdpi.com/2076-0752/7/2/15/pdf |
