| article html file updated | 9 February 2020 10:40 CET | Update | https://www.mdpi.com/2227-9040/6/2/12 |
| article html file updated | 1 October 2019 20:05 CEST | Update | N/A |
| article html file updated | 1 May 2019 09:58 CEST | Update | N/A |
| article html file updated | 17 April 2019 09:50 CEST | Update | N/A |
| article html file updated | 29 March 2019 08:26 CET | Update | N/A |
| article html file updated | 27 June 2018 20:06 CEST | Update | N/A |
| article html file updated | 21 March 2018 15:32 CET | Original file | N/A |
| article xml uploaded. | 21 March 2018 15:31 CET | Original file | https://www.mdpi.com/2227-9040/6/2/12/xml |
| article pdf uploaded. | 21 March 2018 15:31 CET | Version of Record | https://www.mdpi.com/2227-9040/6/2/12/pdf |
