| article html file updated | 8 February 2020 04:11 CET | Update | https://www.mdpi.com/1996-1073/10/4/577 |
| article html file updated | 24 September 2019 11:14 CEST | Update | N/A |
| article html file updated | 4 May 2019 01:05 CEST | Update | N/A |
| article html file updated | 28 April 2017 06:31 CEST | Update | N/A |
| article html file updated | 26 April 2017 05:09 CEST | Original file | N/A |
| article xml uploaded. | 26 April 2017 05:08 CEST | Original file | https://www.mdpi.com/1996-1073/10/4/577/xml |
| article pdf uploaded. | 26 April 2017 05:08 CEST | Updated version of record | https://www.mdpi.com/1996-1073/10/4/577/pdf |
| article pdf uploaded. | 22 April 2017 12:16 CEST | Version of Record | https://www.mdpi.com/1996-1073/10/4/577/pdf-vor |
