| article html file updated | 8 February 2020 12:28 CET | Update | https://www.mdpi.com/2304-8158/6/8/61 |
| article html file updated | 26 September 2019 06:54 CEST | Update | - |
| article html file updated | 3 May 2019 09:06 CEST | Update | - |
| article html file updated | 27 March 2019 18:36 CET | Update | - |
| article html file updated | 1 September 2017 08:27 CEST | Update | - |
| article html file updated | 1 August 2017 10:10 CEST | Original file | - |
| article xml uploaded. | 1 August 2017 09:06 CEST | Original file | https://www.mdpi.com/2304-8158/6/8/61/xml |
| article pdf uploaded. | 1 August 2017 09:06 CEST | Version of Record | https://www.mdpi.com/2304-8158/6/8/61/pdf |
