| article html file updated | 8 February 2020 14:54 CET | Update | https://www.mdpi.com/2220-9964/6/9/272 |
| article html file updated | 26 September 2019 20:35 CEST | Update | - |
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| article html file updated | 26 September 2017 12:56 CEST | Update | - |
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| article xml uploaded. | 30 August 2017 15:15 CEST | Original file | https://www.mdpi.com/2220-9964/6/9/272/xml |
| article pdf uploaded. | 30 August 2017 15:15 CEST | Version of Record | https://www.mdpi.com/2220-9964/6/9/272/pdf |
