Andrianarison, M., Couret, C., Declercq, J.-P., Dubourg, A., Escudie, J., Ranaivonjatovo, H., & Satge, J. (1988). From Germaphosphene To Germathia (or Germaselena) Phosphiranes. Organometallics, 7(7), 1545-1548. https://doi.org/10.1021/om00097a016 (Original work published 1988)