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Sieben S, Hertle R, Gumpert J, Braun V. (October 1998). “The Serratia marcescens hemolysin is secreted but not activated by stable protoplast-type L-forms of Proteus mirabilis.”. Arch Microbiol.170 (4): 236-42.. doi:10.1007/s002030050638. PMID9732437.
Gumpert J, Hoischen C (October 1998). “Use of cell wall-less bacteria (L-forms) for efficient expression and secretion of heterologous gene products”. Current Opinion in Biotechnology9 (5): 506–9. doi:10.1016/S0958-1669(98)80037-2. PMID9821280.
Choi JH, Lee SY (June 2004). “Secretory and extracellular production of recombinant proteins using Escherichia coli”. Appl. Microbiol. Biotechnol.64 (5): 625–35. doi:10.1007/s00253-004-1559-9. PMID14966662.
Hulten K, Karttunen TJ, El-Zimaity HM, Naser SA, Collins MT, Graham DY, El-Zaatari FA (2000). “Identification of cell wall deficient forms of M. avium subsp. paratuberculosis in paraffin embedded tissues from animals with Johne's disease by in situ hybridization”. J Microbiol Methods42 (2): 185–95. doi:10.1016/S0167-7012(00)00185-8. PMID11018275.
Sieben S, Hertle R, Gumpert J, Braun V. (October 1998). “The Serratia marcescens hemolysin is secreted but not activated by stable protoplast-type L-forms of Proteus mirabilis.”. Arch Microbiol.170 (4): 236-42.. doi:10.1007/s002030050638. PMID9732437.
Gumpert J, Hoischen C (October 1998). “Use of cell wall-less bacteria (L-forms) for efficient expression and secretion of heterologous gene products”. Current Opinion in Biotechnology9 (5): 506–9. doi:10.1016/S0958-1669(98)80037-2. PMID9821280.
Choi JH, Lee SY (June 2004). “Secretory and extracellular production of recombinant proteins using Escherichia coli”. Appl. Microbiol. Biotechnol.64 (5): 625–35. doi:10.1007/s00253-004-1559-9. PMID14966662.
Sieben, Stefan. “Die stabilen Protoplasten-Typ L-Formen von Proteus mirabilis als neues Expressionssystem für sekretorische Proteine und integrale Mempranproteine”. Dissertation Universität Jena, April 1998, OCLC-Nummer: 246350676, http://www.worldcat.org/oclc/246350676.