Citavi citation style edit - change parenthesis to brackets in own style created on the basis of cit
I have a problem: How to change/edit citation style -
(1) I need to change parenthesis to brackets (in-text citations, i.e. from (Heller, 1994) to [Heller, 1994] - (harvard-a-like-style) and
(2) in the bibliography I need only surname plus abbrev. from the first name only, then year without brackets and colon after the year, before title, such a harvard-alike-style, precisely , i.e. Heller M., 1982:Encountering the Universe, Pachart Publishing House, Tucson
What elements shall I change in citavi editor style in Citavi Default or shall I do it on the basis of some other style?