Direct evidence of the cyclooxygenase pathway of prostaglandin synthesis in arthropods : genetic and biochemical charaterization of two crustacean cyclooxygenasesVarvas, Külliki; Kurg, Reet; Hansen, Kristella; Järving, Reet; Järving, Ivar; Valmsen, Karin; Lõhelaid, Helike; Samel, NigulasInsect biochemistry and molecular biology2009 / 12, p. 851-860 https://www.sciencedirect.com/science/article/pii/S0965174809001490

Novel membrane-associated prostaglandin E synthase-2 from crustacean arthropodsHansen, Kristella; Varvas, Külliki; Järving, Ivar; Samel, NigulasComparative biochemistry and physiology. Part B, Biochemistry and molecular biology2014 / p. 45-52 : ill

Prostaglandiinide biosüntees punavetikatesVarvas, Külliki; Hansen, Kristella; Kasvandik, SergoXXXII Eesti Keemiapäevad : teaduskonverentsi teesid2011 / lk. 106

Prostaglandin synthesis in marine arthropods and red algae = Prostaglandiinide süntees mere lülijalgsetes ja punavetikatesHansen, Kristella2015

Structural and catalytic insights into the algal prostaglandin H synthase reveal atypical features of the first non-animal cyclooxygenaseVarvas, Külliki; Kasvandik, Sergo; Hansen, Kristella; Järving, Ivar; Morell, Indrek; Samel, NigulasBiochimica et biophysica acta : molecular and cell biology of lipids2013 / p. 863-871 : ill