| article html file updated | 8 February 2020 06:32 CET | Update | https://www.mdpi.com/2218-1997/3/2/47 |
| article html file updated | 24 September 2019 23:30 CEST | Update | - |
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| article html file updated | 30 June 2017 09:16 CEST | Update | - |
| article html file updated | 24 May 2017 08:24 CEST | Original file | - |
| article xml uploaded. | 24 May 2017 08:23 CEST | Original file | https://www.mdpi.com/2218-1997/3/2/47/xml |
| article pdf uploaded. | 24 May 2017 08:23 CEST | Version of Record | https://www.mdpi.com/2218-1997/3/2/47/pdf |
