| article html file updated | 7 February 2020 12:59 CET | Update | https://www.mdpi.com/2227-7390/4/3/50 |
| article html file updated | 21 September 2019 22:33 CEST | Update | - |
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| article html file updated | 8 August 2016 10:54 CEST | Original file | - |
| article xml uploaded. | 8 August 2016 09:48 CEST | Original file | https://www.mdpi.com/2227-7390/4/3/50/xml |
| article pdf uploaded. | 8 August 2016 09:48 CEST | Version of Record | https://www.mdpi.com/2227-7390/4/3/50/pdf |
