Jean-Pierre Schirmann, Paul Bourdauducq "Hydrazine" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2002. doi:10.1002/14356007.a13_177.
Hayashi, Hiromu; Kainoh, Akihiko; Katayama, Masayoshi; Kawasaki, Kengo; Okazaki, Tatsuya (1976), "Hydrazine Production from Ammonia via Azine", Ind. Eng. Chem. Prod. Res. Dev., 15 (4): 299–303, doi:10.1021/i360060a016.
US 4724133, Schirmann, Jean-Pierre; Combroux, Jean & Delavarenne, Serge Y., "Preparation of a concentrated aqueous solution of hydrazine hydrate", published 1988-02-09, assigned to Atochem.
US 3972878, Schirmann, Jean-Pierre; Combroux, Jean & Delavarenne, Serge Yvon, "Method for preparing azines and hydrazones", published 1976-08-03, assigned to Produits Chimiques Ugine Kuhlmann. US 3978049, Schirmann, Jean-Pierre; Tellier, Pierre & Mathais, Henri et al., "Process for the preparation of hydrazine compounds", issued 1976-08-31, assigned to Produits Chimiques Ugine Kuhlmann.