| article html file updated | 8 February 2020 03:42 CET | Update | https://www.mdpi.com/2076-3425/7/4/42 |
| article html file updated | 24 September 2019 08:24 CEST | Update | - |
| article html file updated | 4 May 2019 02:01 CEST | Update | - |
| article html file updated | 28 April 2017 05:32 CEST | Update | - |
| article html file updated | 16 April 2017 09:44 CEST | Original file | - |
| article xml uploaded. | 16 April 2017 09:43 CEST | Original file | https://www.mdpi.com/2076-3425/7/4/42/xml |
| article pdf uploaded. | 16 April 2017 09:43 CEST | Version of Record | https://www.mdpi.com/2076-3425/7/4/42/pdf |
