| article html file updated | 6 February 2020 14:21 CET | Update | https://www.mdpi.com/2075-4698/4/4/712 |
| article html file updated | 20 September 2019 15:51 CEST | Update | N/A |
| article html file updated | 7 May 2019 04:11 CEST | Update | N/A |
| article html file updated | 25 March 2019 19:03 CET | Update | N/A |
| article html file updated | 21 August 2015 03:52 CEST | Original file | N/A |
| article pdf uploaded. | 10 December 2014 13:29 CET | Version of Record | https://www.mdpi.com/2075-4698/4/4/712/pdf |
