| article html file updated | 9 February 2020 06:23 CET | Update | https://www.mdpi.com/2079-9292/7/2/21 |
| article html file updated | 1 May 2019 18:59 CEST | Update | - |
| article html file updated | 17 April 2019 18:14 CEST | Update | - |
| article html file updated | 28 March 2019 22:48 CET | Update | - |
| article pdf uploaded. | 30 March 2018 04:28 CEST | Updated version of record | https://www.mdpi.com/2079-9292/7/2/21/pdf |
| article html file updated | 14 March 2018 11:33 CET | Update | - |
| article html file updated | 12 February 2018 07:14 CET | Original file | - |
| article xml uploaded. | 12 February 2018 07:13 CET | Update | https://www.mdpi.com/2079-9292/7/2/21/xml |
| article xml uploaded. | 12 February 2018 07:13 CET | Update | - |
| article xml uploaded. | 12 February 2018 07:13 CET | Update | - |
| article xml uploaded. | 12 February 2018 07:13 CET | Original file | - |
| article pdf uploaded. | 12 February 2018 07:13 CET | Version of Record | https://www.mdpi.com/2079-9292/7/2/21/pdf-vor |
