| article html file updated | 26 May 2020 10:07 CEST | Update | https://www.mdpi.com/2076-3425/4/2/428 |
| article xml uploaded. | 26 May 2020 10:05 CEST | Update | https://www.mdpi.com/2076-3425/4/2/428/xml |
| article html file updated | 21 March 2019 18:58 CET | Update | N/A |
| article html file updated | 20 August 2015 10:04 CEST | Update | N/A |
| article html file updated | 18 July 2014 03:57 CEST | Original file | N/A |
| article xml file uploaded | 18 July 2014 03:57 CEST | Original file | N/A |
| article pdf uploaded. | 17 June 2014 09:32 CEST | Version of Record | https://www.mdpi.com/2076-3425/4/2/428/pdf |
