| article html file updated | 9 February 2020 01:32 CET | Update | https://www.mdpi.com/1996-1073/11/1/72 |
| article html file updated | 29 September 2019 13:42 CEST | Update | N/A |
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| article html file updated | 29 December 2017 14:26 CET | Original file | N/A |
| article xml uploaded. | 29 December 2017 14:24 CET | Update | https://www.mdpi.com/1996-1073/11/1/72/xml |
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| article pdf uploaded. | 29 December 2017 14:24 CET | Version of Record | https://www.mdpi.com/1996-1073/11/1/72/pdf |