| article html file updated | 7 February 2020 16:30 CET | Update | https://www.mdpi.com/2075-5309/6/4/42 |
| article html file updated | 22 September 2019 03:13 CEST | Update | N/A |
| article html file updated | 5 May 2019 01:22 CEST | Update | N/A |
| article html file updated | 29 December 2016 06:09 CET | Update | N/A |
| article html file updated | 18 October 2016 07:10 CEST | Original file | N/A |
| article xml uploaded. | 18 October 2016 07:08 CEST | Update | https://www.mdpi.com/2075-5309/6/4/42/xml |
| article xml uploaded. | 18 October 2016 07:08 CEST | Update | N/A |
| article xml uploaded. | 18 October 2016 07:08 CEST | Update | N/A |
| article xml uploaded. | 18 October 2016 07:08 CEST | Original file | N/A |
| article pdf uploaded. | 18 October 2016 07:08 CEST | Version of Record | https://www.mdpi.com/2075-5309/6/4/42/pdf |
