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3. Tissue integration of polyacrylamide hydrogel: an experimental study of periurethral, perivesical, and mammary gland tissue in the pig;Christensen;Dermatol Surg,2008
4. Synovial incorporation of polyacrylamide hydrogel after injection into normal and osteoarthritic animal joints;Christensen;Osteoarthr Cartil,2016
5. Intra-articular application of polyacrylamide hydrogel as a treatment of osteoarthritis in the distal interphalangeal joint: case series with 12 horses;Janssen;Pferdeilkunde,2012