| article html file updated | 8 February 2020 19:59 CET | Update | https://www.mdpi.com/2075-4442/5/4/43 | 
| article html file updated | 28 September 2019 03:37 CEST | Update | - | 
| article html file updated | 2 May 2019 17:45 CEST | Update | - | 
| article html file updated | 2 January 2018 14:35 CET | Update | - | 
| article html file updated | 1 November 2017 11:44 CET | Original file | - | 
| article xml uploaded. | 1 November 2017 11:43 CET | Update | https://www.mdpi.com/2075-4442/5/4/43/xml | 
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| article pdf uploaded. | 1 November 2017 11:43 CET | Updated version of record | https://www.mdpi.com/2075-4442/5/4/43/pdf | 
| article pdf uploaded. | 31 October 2017 16:38 CET | Version of Record | https://www.mdpi.com/2075-4442/5/4/43/pdf-vor |