A partnership is dissolved, and its business must be wound up, only upon the occurrence of any of the following events: (1) In a partnership at will, the partnership's having notice from a partner, other than a partner who is dissociated under s. 620.8601(2)-(10), of such partner's express will to withdraw as a partner, or withdraw on a later date specified by the partner; (2) In a partnership for a definite term or particular undertaking: (a) Within 90 days after a partner's dissociation by death