Random Bibtex/Biblatex reminder
To use the square bracket within the prefix or suffix of a cite command wrap the contents with parens.
e.g. \footcite[Case C-101/01][{[47]}]{ReBodilLindqvist}
To use the square bracket within the prefix or suffix of a cite command wrap the contents with parens.
e.g. \footcite[Case C-101/01][{[47]}]{ReBodilLindqvist}