Websites of the institutions: see Chapter 3.

Voting Behaviour in the European Parliament: http://www.votewatch.eu/

European People’s Party: http://www.epp.eu/

Party of European Socialists and Democrats: http://www.pes.org/

Alliance of Liberals and Democrats for Europe: https://www.aldeparty.eu/

European Green Party: http://europeangreens.eu/

COSAC: http://www.cosac.eu/en/

On the concept of democracy as such, several interesting ideas have been put forth in various TED Talks. Former Prime Minister of Greece George Papandreou presented a TED Talk on the future of democracies: https://www.ted.com/talks/george_papandreou_imagine_a_european_democracy_without_borders, as did Brett Hennig: https://www.ted.com/talks/brett_hennig_what_if_we_replaced_politicians_with_randomly_selected_people, and Rory Stewart: https://www.ted.com/talks/rory_stewart_how_to_rebuild_democracy.