Merdeka.com feature (24 Sep 2012) on Gerwani's dilemma over Sukarno's polygamy: it fought for a marriage law banning polygamy from 1950 but set the issue aside when Sukarno married Hartini, Dewi and Yurike Sanger, following the PKI line. Concise account of the polygamy contradiction.
Historia article (2019) on women's wings of parties in the 1955 election (Perwamu, Parkiwa, Wanita Demokrat, Aisyiyah, Bhayangkari), noting the PKI grew close to Gerwani and that Mudigdio and Umi Sardjono entered the DPR for the PKI. Context on Gerwani and elections.
Tempo.co explainer (29 Sept 2021) on organisations 'considered affiliated' with the PKI: Gerwani, Lekra, SOBSI, Pemuda Rakjat. It states, citing Wieringa, that Gerwis became Gerwani at its 1954 second congress, electing PKI member Umi Sardjono as chair. Short, background-level.