| article html file updated | 7 February 2020 05:26 CET | Update | https://www.mdpi.com/2227-9032/4/1/18 |
| article html file updated | 5 May 2019 22:27 CEST | Update | N/A |
| article html file updated | 26 March 2019 22:33 CET | Update | N/A |
| article html file updated | 18 May 2016 12:22 CEST | Original file | N/A |
| article pdf uploaded. | 4 March 2016 14:01 CET | Version of Record | https://www.mdpi.com/2227-9032/4/1/18/pdf |
| article xml uploaded. | 4 March 2016 14:01 CET | Original file | https://www.mdpi.com/2227-9032/4/1/18/xml |
