| article html file updated | 9 February 2020 00:26 CET | Update | https://www.mdpi.com/2076-3271/5/4/38 |
| article html file updated | 29 September 2019 07:17 CEST | Update | N/A |
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| article html file updated | 18 April 2019 05:38 CEST | Update | N/A |
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| article html file updated | 18 December 2017 13:53 CET | Original file | N/A |
| article xml uploaded. | 18 December 2017 13:52 CET | Original file | https://www.mdpi.com/2076-3271/5/4/38/xml |
| article pdf uploaded. | 18 December 2017 13:52 CET | Version of Record | https://www.mdpi.com/2076-3271/5/4/38/pdf |
