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International Journal of Andrology|October 1, 1983
Stage-dependent topographical relationship of spermatogonia and early spermatocytes to Sertoli-Sertoli interspaces in the rat testisN M UlvikInternational Journal of Andrology|April 1, 1984
Lamellar germ cell processes: structures for possible interaction between germs cells and Sertoli cells during spermatogonial differentiation and early meiotic prophaseN M UlvikInternational Journal of Andrology|August 1, 1983
Selective uptake by the Sertoli cells of cytoplasm from normal spermatogonia in the rat testisN M UlvikScandinavian Journal of Gastroenterology|February 27, 2010
A jejunal pouch as substitute stomach after total gastrectomy. An experimental study in ratsN Helsingen, K NygaardAnnales Chirurgiae Et Gynaecologiae|January 1, 1978
Mechanical small bowel obstruction due to adhesionsN M Ulvik, E QvigstadCell and Tissue Research|January 1, 1981
Stage-dependent variations in volume density and size of Sertoli cell vesicles in the rat testisN M Ulvik, E DahlNordisk Medicin|January 1, 1993
[Inguinal hernia--still a surgical challenge]N Helsingen, T O HøstengTidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke|February 24, 2001
[Day surgery of hernia]P Vaagenes, D Helgø, N HelsingenTidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke|October 20, 1992
[Postrenal acute renal failure with deficient or minimal dilatation of the renal pelvis]E Svarstad, N M Ulvik, A AslaksenInternational Urology and Nephrology|January 1, 1997
Shock wave lithotripsy of urinary calculi with Lithocut C-3000 in a small centerL Daehlin, M Hellang, N M UlvikPageof 3