| article html file updated | 9 February 2020 10:50 CET | Update | https://www.mdpi.com/2073-4395/8/4/33 |
| article html file updated | 1 October 2019 21:02 CEST | Update | - |
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| article html file updated | 22 March 2018 17:10 CET | Original file | - |
| article xml uploaded. | 22 March 2018 17:09 CET | Original file | https://www.mdpi.com/2073-4395/8/4/33/xml |
| article pdf uploaded. | 22 March 2018 17:09 CET | Version of Record | https://www.mdpi.com/2073-4395/8/4/33/pdf |
