| article html file updated | 30 August 2025 00:39 CEST | Update | https://www.mdpi.com/2071-1050/9/3/471 | 
| article html file updated | 16 July 2022 05:23 CEST | Update | - | 
| article html file updated | 8 February 2020 01:52 CET | Update | - | 
| article html file updated | 23 September 2019 22:07 CEST | Update | - | 
| article html file updated | 4 May 2019 05:50 CEST | Update | - | 
| article html file updated | 28 March 2017 06:18 CEST | Update | - | 
| article html file updated | 27 March 2017 05:18 CEST | Update | - | 
| article html file updated | 24 March 2017 06:40 CET | Update | - | 
| article html file updated | 21 March 2017 11:52 CET | Original file | - | 
| article xml uploaded. | 21 March 2017 11:51 CET | Original file | https://www.mdpi.com/2071-1050/9/3/471/xml | 
| article pdf uploaded. | 21 March 2017 11:51 CET | Updated version of record | https://www.mdpi.com/2071-1050/9/3/471/pdf | 
| article pdf uploaded. | 21 March 2017 09:50 CET | Version of Record | https://www.mdpi.com/2071-1050/9/3/471/pdf-vor |