| article html file updated | 6 February 2020 06:42 CET | Update | https://www.mdpi.com/2076-328X/4/1/31 |
| article html file updated | 20 September 2019 05:10 CEST | Update | - |
| article html file updated | 7 May 2019 19:52 CEST | Update | - |
| article html file updated | 21 March 2019 10:56 CET | Update | - |
| article html file updated | 19 August 2015 17:10 CEST | Update | - |
| article html file updated | 26 August 2014 03:57 CEST | Update | - |
| article xml file uploaded | 26 August 2014 03:57 CEST | Update | https://www.mdpi.com/2076-328X/4/1/31/xml |
| article html file updated | 15 January 2014 15:17 CET | Original file | - |
| article xml uploaded. | 15 January 2014 15:17 CET | Original file | - |
| article pdf uploaded. | 13 January 2014 16:14 CET | Updated version of record | https://www.mdpi.com/2076-328X/4/1/31/pdf |
| article pdf uploaded. | 10 January 2014 13:39 CET | Version of Record | https://www.mdpi.com/2076-328X/4/1/31/pdf-vor |
