| article html file updated | 8 February 2020 02:17 CET | Update | https://www.mdpi.com/1999-4907/8/4/98 |
| article html file updated | 24 September 2019 00:30 CEST | Update | - |
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| article html file updated | 28 April 2017 06:39 CEST | Update | - |
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| article html file updated | 26 March 2017 22:37 CEST | Update | - |
| article html file updated | 26 March 2017 11:50 CEST | Original file | - |
| article xml uploaded. | 26 March 2017 11:49 CEST | Original file | https://www.mdpi.com/1999-4907/8/4/98/xml |
| article pdf uploaded. | 26 March 2017 11:49 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/4/98/pdf |
