| article html file updated | 6 February 2020 08:08 CET | Update | https://www.mdpi.com/1911-8074/7/1/13 |
| article html file updated | 7 May 2019 16:51 CEST | Update | N/A |
| article html file updated | 21 March 2019 14:27 CET | Update | N/A |
| article html file updated | 20 August 2015 00:55 CEST | Update | N/A |
| article html file updated | 24 June 2014 12:13 CEST | Original file | N/A |
| article xml file uploaded | 24 June 2014 12:13 CEST | Original file | https://www.mdpi.com/1911-8074/7/1/13/xml |
| article pdf uploaded. | 25 March 2014 08:57 CET | Version of Record | https://www.mdpi.com/1911-8074/7/1/13/pdf |
