| article html file updated | 6 February 2020 13:09 CET | Update | https://www.mdpi.com/2079-9721/2/4/301 |
| article html file updated | 20 September 2019 14:10 CEST | Update | N/A |
| article html file updated | 7 May 2019 06:29 CEST | Update | N/A |
| article html file updated | 25 March 2019 16:36 CET | Update | N/A |
| article html file updated | 21 August 2015 00:29 CEST | Original file | N/A |
| article pdf uploaded. | 28 October 2014 07:59 CET | Updated version of record | https://www.mdpi.com/2079-9721/2/4/301/pdf |
| article pdf uploaded. | 27 October 2014 12:00 CET | Version of Record | https://www.mdpi.com/2079-9721/2/4/301/pdf-vor |
