| article html file updated | 7 February 2020 09:30 CET | Update | https://www.mdpi.com/2077-1444/7/6/64 |
| article html file updated | 21 September 2019 18:09 CEST | Update | - |
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| article html file updated | 27 March 2019 06:11 CET | Update | - |
| article html file updated | 29 June 2016 11:24 CEST | Update | - |
| article html file updated | 2 June 2016 08:33 CEST | Original file | - |
| article xml uploaded. | 2 June 2016 08:32 CEST | Original file | https://www.mdpi.com/2077-1444/7/6/64/xml |
| article pdf uploaded. | 2 June 2016 08:32 CEST | Version of Record | https://www.mdpi.com/2077-1444/7/6/64/pdf |
