| article html file updated | 7 February 2020 06:44 CET | Update | https://www.mdpi.com/2220-9964/5/4/47 |
| article html file updated | 5 May 2019 19:45 CEST | Update | - |
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| article html file updated | 27 April 2016 10:21 CEST | Update | - |
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| article xml uploaded. | 1 April 2016 12:14 CEST | Original file | https://www.mdpi.com/2220-9964/5/4/47/xml |
| article pdf uploaded. | 1 April 2016 12:14 CEST | Version of Record | https://www.mdpi.com/2220-9964/5/4/47/pdf |
