| article html file updated | 7 February 2020 23:46 CET | Update | https://www.mdpi.com/2227-9032/5/1/9 |
| article html file updated | 23 September 2019 10:02 CEST | Update | N/A |
| article html file updated | 4 May 2019 10:31 CEST | Update | N/A |
| article html file updated | 30 March 2017 11:34 CEST | Update | N/A |
| article html file updated | 20 February 2017 07:52 CET | Original file | N/A |
| article xml uploaded. | 20 February 2017 07:50 CET | Original file | https://www.mdpi.com/2227-9032/5/1/9/xml |
| article pdf uploaded. | 20 February 2017 07:50 CET | Version of Record | https://www.mdpi.com/2227-9032/5/1/9/pdf |
