| article html file updated | 9 February 2020 00:15 CET | Update | https://www.mdpi.com/2077-0375/7/4/68 |
| article html file updated | 29 September 2019 06:15 CEST | Update | N/A |
| article html file updated | 2 May 2019 08:12 CEST | Update | N/A |
| article html file updated | 18 April 2019 06:00 CEST | Update | N/A |
| article html file updated | 2 January 2018 20:22 CET | Update | N/A |
| article html file updated | 18 December 2017 11:36 CET | Update | N/A |
| article xml uploaded. | 18 December 2017 11:35 CET | Update | https://www.mdpi.com/2077-0375/7/4/68/xml |
| article xml uploaded. | 18 December 2017 11:35 CET | Update | N/A |
| article pdf uploaded. | 18 December 2017 11:35 CET | Updated version of record | https://www.mdpi.com/2077-0375/7/4/68/pdf |
| article html file updated | 15 December 2017 16:07 CET | Original file | N/A |
| article xml uploaded. | 15 December 2017 16:06 CET | Update | N/A |
| article xml uploaded. | 15 December 2017 16:06 CET | Original file | N/A |
| article pdf uploaded. | 15 December 2017 16:06 CET | Version of Record | https://www.mdpi.com/2077-0375/7/4/68/pdf-vor |
