| article html file updated | 7 February 2020 10:21 CET | Update | https://www.mdpi.com/2073-8994/8/6/51 |
| article html file updated | 21 September 2019 19:16 CEST | Update | - |
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| article xml uploaded. | 17 June 2016 14:10 CEST | Original file | https://www.mdpi.com/2073-8994/8/6/51/xml |
| article pdf uploaded. | 17 June 2016 14:10 CEST | Version of Record | https://www.mdpi.com/2073-8994/8/6/51/pdf |
