G. M. Viana, J. A. Ferrão, J. D. Senra, M. G. Vasconcelos, A. B. C. Simas, L. C. S. Aguiar,
A simple approach to symmetrical and unsymmetrical ureas,
Blucher Chemistry Proceedings,
Volume 1,
2013,
Pages 338-338,
ISSN 23184043,
http://dx.doi.org/10.5151/chempro-14bmos-R0338-1
(www.proceedings.blucher.com.br/article-details/a-simple-approach-to-symmetrical-and-unsymmetrical-ureas-8158)
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