| article html file updated | 7 February 2020 20:22 CET | Update | https://www.mdpi.com/2078-2489/8/1/4 |
| article html file updated | 22 September 2019 15:36 CEST | Update | - |
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| article html file updated | 30 March 2017 03:23 CEST | Update | - |
| article html file updated | 27 December 2016 12:18 CET | Original file | - |
| article xml uploaded. | 27 December 2016 11:53 CET | Update | https://www.mdpi.com/2078-2489/8/1/4/xml |
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| article pdf uploaded. | 27 December 2016 11:53 CET | Version of Record | https://www.mdpi.com/2078-2489/8/1/4/pdf |
