| article html file updated | 8 February 2020 02:02 CET | Update | https://www.mdpi.com/2218-1997/3/2/28 |
| article html file updated | 4 May 2019 05:26 CEST | Update | - |
| article html file updated | 30 June 2017 09:15 CEST | Update | - |
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| article html file updated | 23 March 2017 10:00 CET | Original file | - |
| article xml uploaded. | 23 March 2017 09:59 CET | Original file | https://www.mdpi.com/2218-1997/3/2/28/xml |
| article pdf uploaded. | 23 March 2017 09:59 CET | Version of Record | https://www.mdpi.com/2218-1997/3/2/28/pdf |
