| article html file updated | 7 February 2020 17:27 CET | Update | https://www.mdpi.com/2304-6740/4/4/34 |
| article html file updated | 22 September 2019 04:38 CEST | Update | N/A |
| article html file updated | 4 May 2019 23:36 CEST | Update | N/A |
| article html file updated | 30 December 2016 01:57 CET | Update | N/A |
| article html file updated | 3 November 2016 10:24 CET | Original file | N/A |
| article xml uploaded. | 3 November 2016 10:22 CET | Original file | https://www.mdpi.com/2304-6740/4/4/34/xml |
| article pdf uploaded. | 3 November 2016 10:22 CET | Version of Record | https://www.mdpi.com/2304-6740/4/4/34/pdf |
