| article html file updated | 8 February 2020 01:28 CET | Update | https://www.mdpi.com/2076-0752/6/1/2 |
| article html file updated | 4 May 2019 06:44 CEST | Update | - |
| article html file updated | 30 March 2017 03:35 CEST | Update | - |
| article html file updated | 16 March 2017 07:14 CET | Original file | - |
| article xml uploaded. | 16 March 2017 07:13 CET | Original file | https://www.mdpi.com/2076-0752/6/1/2/xml |
| article pdf uploaded. | 16 March 2017 07:13 CET | Updated version of record | https://www.mdpi.com/2076-0752/6/1/2/pdf |
| article pdf uploaded. | 15 March 2017 12:54 CET | Updated version of record | https://www.mdpi.com/2076-0752/6/1/2/pdf-vor |
| article pdf uploaded. | 14 March 2017 16:41 CET | Version of Record | https://www.mdpi.com/2076-0752/6/1/2/pdf-vor |
