| article html file updated | 9 February 2020 06:11 CET | Update | https://www.mdpi.com/2075-4701/8/2/123 | 
| article html file updated | 30 September 2019 16:41 CEST | Update | - | 
| article html file updated | 1 May 2019 19:26 CEST | Update | - | 
| article html file updated | 17 April 2019 18:37 CEST | Update | - | 
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| article html file updated | 24 February 2018 10:26 CET | Update | - | 
| article xml uploaded. | 24 February 2018 10:25 CET | Update | https://www.mdpi.com/2075-4701/8/2/123/xml | 
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| article pdf uploaded. | 24 February 2018 10:25 CET | Updated version of record | https://www.mdpi.com/2075-4701/8/2/123/pdf | 
| article html file updated | 10 February 2018 09:22 CET | Original file | - | 
| article xml uploaded. | 10 February 2018 09:21 CET | Original file | - | 
| article pdf uploaded. | 10 February 2018 09:21 CET | Version of Record | https://www.mdpi.com/2075-4701/8/2/123/pdf-vor |