Copertino DW, Hallick RB (December 1993). "Group II and group III introns of twintrons: potential relationships with nuclear pre-mRNA introns". Trends Biochem. Sci. 18 (12): 467–71. doi:10.1016/0968-0004(93)90008-b. PMID8108859.
Doetsch, NA; Favreau, MR; Kuscuoglu, N; Thompson, MD; Hallick, RB (February 2001). "Chloroplast transformation in Euglena gracilis: splicing of a group III twintron transcribed from a transgenic psbK operon". Current Genetics. 39 (1): 49–60. doi:10.1007/s002940000174. PMID11318107. S2CID6413004.
Copertino DW, Hallick RB (December 1993). "Group II and group III introns of twintrons: potential relationships with nuclear pre-mRNA introns". Trends Biochem. Sci. 18 (12): 467–71. doi:10.1016/0968-0004(93)90008-b. PMID8108859.
Doetsch, NA; Favreau, MR; Kuscuoglu, N; Thompson, MD; Hallick, RB (February 2001). "Chloroplast transformation in Euglena gracilis: splicing of a group III twintron transcribed from a transgenic psbK operon". Current Genetics. 39 (1): 49–60. doi:10.1007/s002940000174. PMID11318107. S2CID6413004.
Doetsch, NA; Favreau, MR; Kuscuoglu, N; Thompson, MD; Hallick, RB (February 2001). "Chloroplast transformation in Euglena gracilis: splicing of a group III twintron transcribed from a transgenic psbK operon". Current Genetics. 39 (1): 49–60. doi:10.1007/s002940000174. PMID11318107. S2CID6413004.