| article html file updated | 6 February 2020 06:15 CET | Update | https://www.mdpi.com/2077-0375/3/4/424 |
| article html file updated | 7 May 2019 20:46 CEST | Update | N/A |
| article html file updated | 21 March 2019 09:34 CET | Update | N/A |
| article html file updated | 19 August 2015 13:56 CEST | Update | N/A |
| article html file updated | 18 March 2014 09:53 CET | Original file | N/A |
| article xml file uploaded | 18 March 2014 09:53 CET | Original file | https://www.mdpi.com/2077-0375/3/4/424/xml |
| article supplementary file uploaded. | 16 December 2013 18:59 CET | - | https://www.mdpi.com/2077-0375/3/4/424#supplementary |
| article pdf uploaded. | 16 December 2013 18:59 CET | Version of Record | https://www.mdpi.com/2077-0375/3/4/424/pdf |
