Mortaheb, H. R., Mafi, M., Mokhtarani, B., Khosravi, K. and Mashkini, F. (2010) “Optimization of NMP extraction in 1,3-butadiene production line”, Eclética Química, 35(1), pp. 85–89. doi: 10.26850/1678-4618eqj.v35.1.2010.p85-89.