| article html file updated | 8 February 2020 01:15 CET | Update | https://www.mdpi.com/2305-6304/5/1/9 |
| article html file updated | 23 September 2019 18:37 CEST | Update | - |
| article html file updated | 4 May 2019 07:11 CEST | Update | - |
| article html file updated | 30 March 2017 09:04 CEST | Update | - |
| article html file updated | 11 March 2017 07:22 CET | Original file | - |
| article xml uploaded. | 11 March 2017 07:21 CET | Update | https://www.mdpi.com/2305-6304/5/1/9/xml |
| article pdf uploaded. | 11 March 2017 07:21 CET | Version of Record | https://www.mdpi.com/2305-6304/5/1/9/pdf |
