| article html file updated | 7 February 2020 15:28 CET | Update | https://www.mdpi.com/2076-3425/6/4/41 |
| article html file updated | 22 September 2019 01:31 CEST | Update | N/A |
| article html file updated | 5 May 2019 03:15 CEST | Update | N/A |
| article html file updated | 27 December 2016 02:16 CET | Update | N/A |
| article html file updated | 23 September 2016 14:20 CEST | Original file | N/A |
| article xml uploaded. | 23 September 2016 14:18 CEST | Original file | https://www.mdpi.com/2076-3425/6/4/41/xml |
| article pdf uploaded. | 23 September 2016 14:18 CEST | Version of Record | https://www.mdpi.com/2076-3425/6/4/41/pdf |
