P. K.  Upadhyay and Kumar, P., ?Short and efficient synthesis of (S)-(+)-2-(Hydroxymethyl)-6-piperidin-2-one?, Synthesis-Stuttgart, no. 15, pp. 2512-2514, 2010.

K. D.  Mane, Kamble, R. B., and Suryavanshi, G., ?Short enantioselective total synthesis of (+)-tofacitinib?, Tetrahedron Letters, vol. 67, p. 152838, 2021.