| article html file updated | 7 February 2020 15:51 CET | Update | https://www.mdpi.com/2079-9721/4/4/30 |
| article html file updated | 5 May 2019 02:33 CEST | Update | N/A |
| article html file updated | 30 September 2016 11:30 CEST | Original file | N/A |
| article xml uploaded. | 30 September 2016 11:29 CEST | Original file | https://www.mdpi.com/2079-9721/4/4/30/xml |
| article pdf uploaded. | 30 September 2016 11:29 CEST | Version of Record | https://www.mdpi.com/2079-9721/4/4/30/pdf |
