| article html file updated | 8 February 2020 04:03 CET | Update | https://www.mdpi.com/2220-9964/6/4/124 |
| article html file updated | 24 September 2019 10:31 CEST | Update | - |
| article html file updated | 4 May 2019 01:20 CEST | Update | - |
| article html file updated | 28 April 2017 08:19 CEST | Update | - |
| article html file updated | 20 April 2017 15:17 CEST | Original file | - |
| article xml uploaded. | 20 April 2017 15:15 CEST | Original file | https://www.mdpi.com/2220-9964/6/4/124/xml |
| article pdf uploaded. | 20 April 2017 15:15 CEST | Version of Record | https://www.mdpi.com/2220-9964/6/4/124/pdf |
