| article html file updated | 9 February 2020 08:17 CET | Update | https://www.mdpi.com/2227-7390/6/3/33 |
| article html file updated | 1 October 2019 04:49 CEST | Update | - |
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| article xml uploaded. | 1 March 2018 16:29 CET | Update | https://www.mdpi.com/2227-7390/6/3/33/xml |
| article pdf uploaded. | 1 March 2018 16:29 CET | Version of Record | https://www.mdpi.com/2227-7390/6/3/33/pdf |
