| article html file updated | 7 February 2020 11:22 CET | Update | https://www.mdpi.com/2225-1146/4/3/31 |
| article html file updated | 5 May 2019 10:44 CEST | Update | N/A |
| article html file updated | 27 March 2019 09:41 CET | Update | N/A |
| article html file updated | 14 March 2018 10:20 CET | Update | N/A |
| article html file updated | 8 July 2016 09:44 CEST | Original file | N/A |
| article xml uploaded. | 8 July 2016 09:43 CEST | Original file | https://www.mdpi.com/2225-1146/4/3/31/xml |
| article pdf uploaded. | 8 July 2016 09:43 CEST | Version of Record | https://www.mdpi.com/2225-1146/4/3/31/pdf |
