| article html file updated | 9 February 2020 00:31 CET | Update | https://www.mdpi.com/2076-3271/5/4/37 |
| article html file updated | 29 September 2019 08:25 CEST | Update | - |
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| article html file updated | 14 March 2018 17:45 CET | Update | - |
| article html file updated | 19 December 2017 11:14 CET | Original file | - |
| article xml uploaded. | 19 December 2017 11:13 CET | Original file | https://www.mdpi.com/2076-3271/5/4/37/xml |
| article pdf uploaded. | 19 December 2017 11:13 CET | Version of Record | https://www.mdpi.com/2076-3271/5/4/37/pdf |
