Shtarei Mechoznaah - Investments in which the managing partner writes up a document indebting himself for half the anticipated profits, writing down a specific amount, which the investor will forgive if there are no profits: Bava Metzia 68a
How long a managing partner is required to stay in a partnership for taking care of livestock, before he may terminate the arrangement: Bava Metzia 69a-b
How is considered a valid 'purchaser' if multiple parties give money to an agent to acquire something on their behalf, and he acquires it in the name of one of them: Bava Metzia 74a
Dealing with a partner upfront, to avoid suspicion of impropriety, when dissolving an investing/managing partnership: Tosafot Bava Metzia 69b "ki"
Language which legally dissolves a partnership: Keritot 24b