| article html file updated | 8 February 2020 08:47 CET | Update | https://www.mdpi.com/2078-2489/8/2/68 |
| article html file updated | 25 September 2019 11:02 CEST | Update | - |
| article html file updated | 3 May 2019 16:30 CEST | Update | - |
| article html file updated | 28 June 2017 13:50 CEST | Update | - |
| article html file updated | 20 June 2017 12:51 CEST | Original file | - |
| article xml uploaded. | 20 June 2017 12:50 CEST | Update | https://www.mdpi.com/2078-2489/8/2/68/xml |
| article pdf uploaded. | 20 June 2017 12:50 CEST | Version of Record | https://www.mdpi.com/2078-2489/8/2/68/pdf |
