| article html file updated | 7 February 2020 02:12 CET | Update | https://www.mdpi.com/2079-6439/3/4/539 |
| article html file updated | 6 May 2019 05:02 CEST | Update | N/A |
| article html file updated | 26 March 2019 16:25 CET | Original file | N/A |
| article pdf uploaded. | 16 December 2015 11:58 CET | Updated version of record | https://www.mdpi.com/2079-6439/3/4/539/pdf |
| article xml uploaded. | 14 December 2015 12:02 CET | Original file | https://www.mdpi.com/2079-6439/3/4/539/xml |
| article pdf uploaded. | 14 December 2015 12:02 CET | Version of Record | https://www.mdpi.com/2079-6439/3/4/539/pdf-vor |
