| article html file updated | 6 February 2020 17:27 CET | Update | https://www.mdpi.com/2075-4442/3/2/181 |
| article html file updated | 6 May 2019 22:20 CEST | Update | - |
| article html file updated | 26 March 2019 00:19 CET | Original file | - |
| article pdf uploaded. | 10 April 2015 16:21 CEST | Updated version of record | https://www.mdpi.com/2075-4442/3/2/181/pdf |
| article pdf uploaded. | 9 April 2015 13:49 CEST | Version of Record | https://www.mdpi.com/2075-4442/3/2/181/pdf-vor |
