| article html file updated | 8 February 2020 04:57 CET | Update | https://www.mdpi.com/2227-9067/4/5/34 |
| article html file updated | 24 September 2019 15:17 CEST | Update | - |
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| article pdf uploaded. | 9 May 2017 16:08 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/5/34/pdf |
| article html file updated | 3 May 2017 13:35 CEST | Original file | - |
| article xml uploaded. | 3 May 2017 13:34 CEST | Original file | https://www.mdpi.com/2227-9067/4/5/34/xml |
