| article html file updated | 6 February 2020 10:06 CET | Update | https://www.mdpi.com/2073-4409/3/2/660 |
| article html file updated | 20 September 2019 09:29 CEST | Update | N/A |
| article html file updated | 7 May 2019 12:49 CEST | Update | N/A |
| article html file updated | 21 March 2019 19:16 CET | Update | N/A |
| article html file updated | 29 June 2017 13:17 CEST | Update | N/A |
| article html file updated | 20 August 2015 10:30 CEST | Update | N/A |
| article html file updated | 11 July 2014 10:24 CEST | Original file | N/A |
| article xml file uploaded | 11 July 2014 10:24 CEST | Original file | https://www.mdpi.com/2073-4409/3/2/660/xml |
| article pdf uploaded. | 23 June 2014 10:11 CEST | Updated version of record | https://www.mdpi.com/2073-4409/3/2/660/pdf |
| article pdf uploaded. | 20 June 2014 10:26 CEST | Version of Record | https://www.mdpi.com/2073-4409/3/2/660/pdf-vor |
