| article html file updated | 29 August 2025 23:08 CEST | Update | https://www.mdpi.com/2072-6651/8/6/159 | 
| article html file updated | 16 July 2022 02:28 CEST | Update | - | 
| article html file updated | 7 February 2020 09:09 CET | Update | - | 
| article html file updated | 5 May 2019 14:55 CEST | Update | - | 
| article html file updated | 27 March 2019 05:32 CET | Update | - | 
| article html file updated | 29 June 2016 11:44 CEST | Update | - | 
| article html file updated | 24 May 2016 11:11 CEST | Original file | - | 
| article xml uploaded. | 24 May 2016 11:09 CEST | Original file | https://www.mdpi.com/2072-6651/8/6/159/xml | 
| article pdf uploaded. | 24 May 2016 11:09 CEST | Version of Record | https://www.mdpi.com/2072-6651/8/6/159/pdf |