Comparative molecular field analysis of artemisinin derivatives: Ab initio versus semiempirical optimized structures. - Somsak Tonmunphean; Sirirat Kokpol; Vudhichai Parasuk; Peter Wolschann; Rudolf H. Winger; Klaus R. Liedl; Bernd M. Rode (J. Comput. Aided Mol. Des., 1998)