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Teresa Ortiz-Gómez; Agata Ignaciuk. "Pregnancy and labour cause more deaths than oral contraceptives": The debate on the pill in the Spanish press in the 1960s and 1970s. Public Understanding of Science. 2013, 24 (6): 658–671. PMID 24259515. doi:10.1177/0963662513509764.
Teresa Ortiz-Gómez; Agata Ignaciuk. "Pregnancy and labour cause more deaths than oral contraceptives": The debate on the pill in the Spanish press in the 1960s and 1970s. Public Understanding of Science. 2013, 24 (6): 658–671. PMID 24259515. doi:10.1177/0963662513509764.