Gunnar Heinsohn/Otto Steiger: "Witchcraft, Population Catastrophe and Economic Crisis in Renaissance Europe: An Alternative Macroeconomic Explanation.", University of Bremen 2004 (download); Heinsohn, Gunnar; Steiger, Otto (May 1982). «The Elimination of Medieval Birth Control and the Witch Trials of Modern Times». International Journal of Women's Studies3: 193–214.Heinsohn, Gunnar; Steiger, Otto (1999). «Birth Control: The Political-Economic Rationale Behind Jean Bodin's 'Démonomanie'». History of Political Economy31 (3): 423–448. doi:10.1215/00182702-31-3-423. PMID21275210.
Sandall J et al. Midwife-led continuity models versus other models of care for childbearing women. Cochrane Database Syst Rev. 2013 Aug 21;8:CD004667. doi: 10.1002/14651858.CD004667.pub3. PMID 23963739
Gunnar Heinsohn/Otto Steiger: "Witchcraft, Population Catastrophe and Economic Crisis in Renaissance Europe: An Alternative Macroeconomic Explanation.", University of Bremen 2004 (download); Heinsohn, Gunnar; Steiger, Otto (May 1982). «The Elimination of Medieval Birth Control and the Witch Trials of Modern Times». International Journal of Women's Studies3: 193–214.Heinsohn, Gunnar; Steiger, Otto (1999). «Birth Control: The Political-Economic Rationale Behind Jean Bodin's 'Démonomanie'». History of Political Economy31 (3): 423–448. doi:10.1215/00182702-31-3-423. PMID21275210.
scribd.com
Gunnar Heinsohn/Otto Steiger: "Witchcraft, Population Catastrophe and Economic Crisis in Renaissance Europe: An Alternative Macroeconomic Explanation.", University of Bremen 2004 (download); Heinsohn, Gunnar; Steiger, Otto (May 1982). «The Elimination of Medieval Birth Control and the Witch Trials of Modern Times». International Journal of Women's Studies3: 193–214.Heinsohn, Gunnar; Steiger, Otto (1999). «Birth Control: The Political-Economic Rationale Behind Jean Bodin's 'Démonomanie'». History of Political Economy31 (3): 423–448. doi:10.1215/00182702-31-3-423. PMID21275210.