| article html file updated | 9 February 2020 06:43 CET | Update | https://www.mdpi.com/2075-163X/8/2/68 |
| article html file updated | 30 September 2019 19:53 CEST | Update | - |
| article html file updated | 1 May 2019 18:14 CEST | Update | - |
| article html file updated | 17 April 2019 17:34 CEST | Update | - |
| article html file updated | 28 March 2019 23:30 CET | Update | - |
| article html file updated | 14 March 2018 15:08 CET | Update | - |
| article html file updated | 22 February 2018 09:10 CET | Original file | - |
| article xml uploaded. | 22 February 2018 09:08 CET | Update | https://www.mdpi.com/2075-163X/8/2/68/xml |
| article xml uploaded. | 22 February 2018 09:08 CET | Update | - |
| article xml uploaded. | 22 February 2018 09:08 CET | Original file | - |
| article pdf uploaded. | 22 February 2018 09:08 CET | Updated version of record | https://www.mdpi.com/2075-163X/8/2/68/pdf |
| article pdf uploaded. | 14 February 2018 19:18 CET | Version of Record | https://www.mdpi.com/2075-163X/8/2/68/pdf-vor |
