| article html file updated | 8 February 2020 06:30 CET | Update | https://www.mdpi.com/2076-3425/7/6/56 |
| article html file updated | 24 September 2019 23:17 CEST | Update | - |
| article html file updated | 3 May 2019 20:47 CEST | Update | - |
| article html file updated | 27 June 2017 09:55 CEST | Update | - |
| article html file updated | 23 May 2017 14:59 CEST | Original file | - |
| article xml uploaded. | 23 May 2017 14:58 CEST | Original file | https://www.mdpi.com/2076-3425/7/6/56/xml |
| article pdf uploaded. | 23 May 2017 14:58 CEST | Version of Record | https://www.mdpi.com/2076-3425/7/6/56/pdf |
