| article html file updated | 9 February 2020 09:02 CET | Update | https://www.mdpi.com/1424-8247/11/1/28 |
| article html file updated | 1 October 2019 09:06 CEST | Update | - |
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| article html file updated | 8 March 2018 07:25 CET | Original file | - |
| article xml uploaded. | 8 March 2018 07:24 CET | Original file | https://www.mdpi.com/1424-8247/11/1/28/xml |
| article pdf uploaded. | 8 March 2018 07:24 CET | Version of Record | https://www.mdpi.com/1424-8247/11/1/28/pdf |
