| article html file updated | 6 February 2020 23:26 CET | Update | https://www.mdpi.com/2075-163X/5/4/512 |
| article html file updated | 6 May 2019 10:02 CEST | Update | N/A |
| article html file updated | 26 March 2019 11:56 CET | Original file | N/A |
| article pdf uploaded. | 2 October 2015 11:37 CEST | Updated version of record | https://www.mdpi.com/2075-163X/5/4/512/pdf |
| article pdf uploaded. | 30 September 2015 17:16 CEST | Version of Record | https://www.mdpi.com/2075-163X/5/4/512/pdf-vor |
