| article html file updated | 6 February 2020 16:51 CET | Update | https://www.mdpi.com/1424-8220/15/3/6996 |
| article html file updated | 6 May 2019 23:20 CEST | Update | - |
| article html file updated | 25 March 2019 23:22 CET | Update | - |
| article html file updated | 21 August 2015 09:09 CEST | Update | - |
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| article xml file uploaded | 21 April 2015 06:04 CEST | Update | https://www.mdpi.com/1424-8220/15/3/6996/xml |
| article html file updated | 17 April 2015 13:52 CEST | Original file | - |
| article xml file uploaded | 17 April 2015 13:52 CEST | Original file | - |
| article pdf uploaded. | 23 March 2015 10:12 CET | Version of Record | https://www.mdpi.com/1424-8220/15/3/6996/pdf |
