Chien, P.W.; Wu, S.L.; Lee, S.C.; Chang, S.J.; Miura, H.; Koh, S.; Shiraki, Y.: '<strong><i>P</i></strong>-type delta-doped SiGe/Si heterostructure field effect transistors', Electronics Letters, 2002, 38, (21), p. 1289-1291, DOI: 10.1049/el:20020851
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1ab00hetse7mq.x-iet-live-01content/journals/10.1049/el_20020851