| article html file updated | 8 February 2020 01:34 CET | Update | https://www.mdpi.com/2227-9067/4/3/18 |
| article html file updated | 4 May 2019 06:30 CEST | Update | - |
| article html file updated | 28 March 2017 08:32 CEST | Update | - |
| article html file updated | 17 March 2017 02:57 CET | Update | - |
| article xml uploaded. | 17 March 2017 02:56 CET | Update | https://www.mdpi.com/2227-9067/4/3/18/xml |
| article pdf uploaded. | 17 March 2017 02:56 CET | Updated version of record | https://www.mdpi.com/2227-9067/4/3/18/pdf |
| article html file updated | 16 March 2017 12:08 CET | Original file | - |
| article pdf uploaded. | 16 March 2017 12:07 CET | Version of Record | https://www.mdpi.com/2227-9067/4/3/18/pdf-vor |
