| article html file updated | 7 February 2020 23:31 CET | Update | https://www.mdpi.com/2079-6412/7/2/30 |
| article html file updated | 23 September 2019 08:39 CEST | Update | N/A |
| article html file updated | 4 May 2019 11:00 CEST | Update | N/A |
| article html file updated | 2 March 2017 03:36 CET | Update | N/A |
| article html file updated | 16 February 2017 09:33 CET | Original file | N/A |
| article xml uploaded. | 16 February 2017 09:32 CET | Original file | https://www.mdpi.com/2079-6412/7/2/30/xml |
| article pdf uploaded. | 16 February 2017 09:32 CET | Version of Record | https://www.mdpi.com/2079-6412/7/2/30/pdf |
