Verkruijsse, Hermann D.; Graaf, Wim de; Brandsma, Lambert. An Efficient and Quick Laboratory Scale Method for the Ethynylation of Some Aliphatic and Cycloaliphatic Carbonyl Compounds. Synthetic Communications. 1988, 18 (2): 131–134. ISSN 0039-7911. doi:10.1080/00397918808077336.
Verkruijsse, Hermann D.; Graaf, Wim de; Brandsma, Lambert. An Efficient and Quick Laboratory Scale Method for the Ethynylation of Some Aliphatic and Cycloaliphatic Carbonyl Compounds. Synthetic Communications. 1988, 18 (2): 131–134. ISSN 0039-7911. doi:10.1080/00397918808077336.