(Reuters) - Private equity group 3i <III.L> has received several bids from fellow buyout firms for UK software provider Civica, a source familiar with the matter said on Monday. Advent International, Apax Partners, Bain Capital and Cinven have all submitted bids for Civica, the source said. Under pressure from frustrated shareholders to cut its debt of 1.2 billion pounds to less than 1 billion pounds by June, 3i had said it will focus on asset disposals to achieve this goal and boost its weak share price.