| article html file updated | 26 September 2022 11:25 CEST | Original file | https://www.mdpi.com/2504-3900/2/6/270 |
| article pdf uploaded. | 23 March 2018 09:31 CET | Updated version of record | https://www.mdpi.com/2504-3900/2/6/270/pdf |
| article pdf uploaded. | 14 February 2018 07:10 CET | Version of Record | https://www.mdpi.com/2504-3900/2/6/270/pdf-vor |
