| article html file updated | 7 February 2020 10:05 CET | Update | https://www.mdpi.com/2311-5521/1/2/18 |
| article html file updated | 5 May 2019 13:06 CEST | Update | - |
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| article html file updated | 27 October 2017 10:21 CEST | Update | - |
| article html file updated | 14 June 2016 22:42 CEST | Original file | - |
| article xml uploaded. | 13 June 2016 14:29 CEST | Original file | https://www.mdpi.com/2311-5521/1/2/18/xml |
| article pdf uploaded. | 13 June 2016 14:29 CEST | Version of Record | https://www.mdpi.com/2311-5521/1/2/18/pdf |
