| article html file updated | 9 February 2020 05:06 CET | Update | https://www.mdpi.com/2227-7072/6/1/15 |
| article html file updated | 1 May 2019 21:55 CEST | Update | - |
| article html file updated | 17 April 2019 20:42 CEST | Update | - |
| article html file updated | 28 March 2019 20:01 CET | Update | - |
| article html file updated | 26 March 2018 15:42 CEST | Update | - |
| article html file updated | 1 February 2018 04:22 CET | Original file | - |
| article xml uploaded. | 1 February 2018 04:21 CET | Original file | https://www.mdpi.com/2227-7072/6/1/15/xml |
| article pdf uploaded. | 1 February 2018 04:21 CET | Version of Record | https://www.mdpi.com/2227-7072/6/1/15/pdf |
