| article html file updated | 8 February 2020 02:09 CET | Update | https://www.mdpi.com/2226-4787/5/2/16 |
| article html file updated | 23 September 2019 23:46 CEST | Update | - |
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| article html file updated | 24 March 2017 09:55 CET | Original file | - |
| article xml uploaded. | 24 March 2017 09:54 CET | Original file | https://www.mdpi.com/2226-4787/5/2/16/xml |
| article pdf uploaded. | 24 March 2017 09:54 CET | Version of Record | https://www.mdpi.com/2226-4787/5/2/16/pdf |
