| article html file updated | 8 February 2020 20:22 CET | Update | https://www.mdpi.com/2078-2489/8/4/138 | 
| article html file updated | 28 September 2019 05:59 CEST | Update | - | 
| article html file updated | 2 May 2019 16:54 CEST | Update | - | 
| article html file updated | 2 January 2018 13:41 CET | Update | - | 
| article html file updated | 7 November 2017 08:20 CET | Update | - | 
| article xml uploaded. | 7 November 2017 08:19 CET | Update | https://www.mdpi.com/2078-2489/8/4/138/xml | 
| article xml uploaded. | 7 November 2017 08:19 CET | Update | - | 
| article pdf uploaded. | 7 November 2017 08:19 CET | Updated version of record | https://www.mdpi.com/2078-2489/8/4/138/pdf | 
| article html file updated | 4 November 2017 12:00 CET | Original file | - | 
| article xml uploaded. | 4 November 2017 11:59 CET | Update | - | 
| article xml uploaded. | 4 November 2017 11:59 CET | Original file | - | 
| article pdf uploaded. | 4 November 2017 11:59 CET | Version of Record | https://www.mdpi.com/2078-2489/8/4/138/pdf-vor |