| article html file updated | 6 February 2020 17:09 CET | Update | https://www.mdpi.com/1999-4915/7/4/1667 |
| article html file updated | 20 September 2019 19:29 CEST | Update | - |
| article html file updated | 6 May 2019 22:49 CEST | Update | - |
| article html file updated | 25 March 2019 23:51 CET | Update | - |
| article html file updated | 29 June 2017 13:18 CEST | Update | - |
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| article html file updated | 21 August 2015 09:42 CEST | Update | - |
| article html file updated | 29 April 2015 04:00 CEST | Original file | - |
| article xml file uploaded | 29 April 2015 04:00 CEST | Original file | https://www.mdpi.com/1999-4915/7/4/1667/xml |
| article pdf uploaded. | 31 March 2015 12:38 CEST | Version of Record | https://www.mdpi.com/1999-4915/7/4/1667/pdf |
