| article html file updated | 8 February 2020 20:47 CET | Update | https://www.mdpi.com/2227-9059/5/4/64 |
| article html file updated | 2 May 2019 15:54 CEST | Update | N/A |
| article html file updated | 2 January 2018 16:40 CET | Update | N/A |
| article html file updated | 10 November 2017 09:52 CET | Original file | N/A |
| article xml uploaded. | 10 November 2017 09:51 CET | Original file | https://www.mdpi.com/2227-9059/5/4/64/xml |
| article pdf uploaded. | 10 November 2017 09:51 CET | Updated version of record | https://www.mdpi.com/2227-9059/5/4/64/pdf |
| article pdf uploaded. | 9 November 2017 15:56 CET | Version of Record | https://www.mdpi.com/2227-9059/5/4/64/pdf-vor |
