N. Rosas, R. Salcedo, P. Sharma, J. Luis Arias, I. Arellano, and A. Cabrera, “O-Alkylation versus C-Alkylation in the Synthesis of 5,6-Dihydro-4H-oxacin-4-ones: Theoretical Approach”, ajc, vol. 21, no. 1, pp. 541–548, Mar. 2010.