| article html file updated | 8 February 2020 11:47 CET | Update | https://www.mdpi.com/2076-0787/6/3/51 |
| article html file updated | 3 May 2019 10:50 CEST | Update | N/A |
| article html file updated | 27 March 2019 17:15 CET | Update | N/A |
| article pdf uploaded. | 26 July 2017 08:06 CEST | Updated version of record | https://www.mdpi.com/2076-0787/6/3/51/pdf |
| article html file updated | 24 July 2017 10:26 CEST | Update | N/A |
| article html file updated | 24 July 2017 10:23 CEST | Update | N/A |
| article html file updated | 24 July 2017 10:21 CEST | Original file | N/A |
| article xml uploaded. | 24 July 2017 10:19 CEST | Update | https://www.mdpi.com/2076-0787/6/3/51/xml |
| article pdf uploaded. | 24 July 2017 09:45 CEST | Updated version of record | https://www.mdpi.com/2076-0787/6/3/51/pdf-vor |
| article pdf uploaded. | 22 July 2017 13:10 CEST | Version of Record | https://www.mdpi.com/2076-0787/6/3/51/pdf-vor |
