<ref name=scott2011>{{cite book| title = Encyclopedia of Inorganic Chemistry| chapter = Boron: Inorganic Chemistry| author1 = Robert A. Scott| publisher = Wiley| year = 2011| isbn = 9780470862100| page = 401}}</ref>

<ref name=brown1970>Charles Allan Brown (1970): "Catalytic hydrogenation. V. Reaction of sodium borohydride with aqueous nickel salts. P-1 nickel boride, a convenient, highly active nickel hydrogenation catalyst".  ''[[The Journal of Organic Chemistry]]'', volume 35, issue 6, pages 1900–1904. {{doi|10.1021/jo00831a039}}</ref>

<ref name=brown1973>Charles Allan Brown and Vijay K. Ahuja (1973): "Catalytic hydrogenation. VI. Reaction of sodium borohydride with nickel salts in ethanol solution. P-2 Nickel, a highly convenient, new, selective hydrogenation catalyst with great sensitivity to substrate structure". ''Journal of Organic Chemistry'', volume 38, issue 12, pages 2226–2230. {{doi|10.1021/jo00952a024}}</ref>

<ref name=brown1963a>Charles A. Brown and Herbert C. Brown (1963): "The reaction of sodium borohydride with nickel acetate in aqueous solution—a convenient synthesis of a nickel hydrogenation catalyst of low isomerization tendency". ''Journal of the American Chemical Society'' (Communications to the Editor), volume 85, issue 7, pages 1003-1005. {{doi|10.1021/ja00890a040}}</ref>

<ref name=brown1963b>Herbert C. Brown and Charles A. Brown (1963): "The reaction of sodium borohydride with nickel acetate in ethanol solution: a highly selective nickel hydrogenation catalyst". ''Journal of the American Chemical Society'' (Communications to the Editor), volume 85, issue 7, pages 1005-1006. {{doi|10.1021/ja00890a041}}</ref>

<ref name=greenXXXX>{{Greenwood&Earnshaw2nd|page=147}}</ref>

<ref name=hofer1964>L. J. E. Hofer, J. F. Shultz, R. D. Panson, and R. B. Anderson (1964): "The nature of the nickel boride formed by the action of sodium borohydride on nickel salts". ''Inorganic Chemistry'', volume 3, issue 12, pages 1783–1785. {{doi|10.1021/ic50022a031}}</ref>

<ref name=johns2007>{{cite journal | title=The unusual nanostructure of nickel–boron catalyst | first1= J. | last1= Geng | first2=D.A. | last2=Jefferson | first3=B.F.G. | last3=Johnson | journal=[[Chemical Communications]] | year=2007 | pages=969-971 | doi=10.1039/B615529D}}</ref>

<ref name=ali>Al-Zain Omar Ali, Al-Masoudi, and Reem Soliyman (2017): "Nano-metal borides of cobalt, nickel and copper". ''Journal of Nanomedicine & Nanotechnology'', volume 8, issue 6, pages 477–. {{doi|10.4172/2157-7439.1000477}}</ref>

<ref name=burk1999>{{cite book|title = Handbook of Reagents for Organic Synthesis, Oxidizing and Reducing Agents| chapter = Nickel boride| author1 = Steven D. Burke| author2 = Rick L. Danheiser|authorlink2=Rick L. Danheiser| publisher = Wiley| year = 1999| isbn = 978-0-471-97926-5| page = 246}}</ref>

<ref name=solo2007>{{cite book | title = Organic Chemistry, 9th Edition | chapter = | author1 = T. W. Graham Solomons | author2 = Craig Fryhle | publisher = Wiley | year = 2007 | isbn = 978-0-471-68496-1 | page = 361 }}</ref>