| article html file updated | 8 February 2020 07:51 CET | Update | https://www.mdpi.com/2227-9067/4/6/47 |
| article html file updated | 25 September 2019 06:11 CEST | Update | - |
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| article html file updated | 27 June 2017 10:02 CEST | Update | - |
| article html file updated | 9 June 2017 08:57 CEST | Original file | - |
| article xml uploaded. | 9 June 2017 08:56 CEST | Original file | https://www.mdpi.com/2227-9067/4/6/47/xml |
| article pdf uploaded. | 9 June 2017 08:55 CEST | Version of Record | https://www.mdpi.com/2227-9067/4/6/47/pdf |
