| article html file updated | 7 February 2020 07:40 CET | Update | https://www.mdpi.com/2073-4352/6/4/47 |
| article html file updated | 5 May 2019 17:49 CEST | Update | - |
| article html file updated | 27 March 2019 02:43 CET | Update | - |
| article html file updated | 27 April 2016 11:14 CEST | Update | - |
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| article xml uploaded. | 22 April 2016 16:27 CEST | Original file | https://www.mdpi.com/2073-4352/6/4/47/xml |
| article pdf uploaded. | 22 April 2016 16:27 CEST | Version of Record | https://www.mdpi.com/2073-4352/6/4/47/pdf |
