TULSA - University of Denver junior Annette Aksdal (Oslo, Norway) advanced to the consolation finals to highlight action for the Pioneers today at the ITA Central Regional. Aksdal defeated Boise State's Polina Kokoulina in the quarterfinals and Oklahoma's Maria Malashnikova in the semifinals to earn a spot in the finals against New Mexico's Sandra Zmak.   Junior Mallory Voelker (Dousman, Wis.) advanced to the semifinals in the championship bracket. Voelker defeated Arkansas' Mayori Franco in the quarterfinals before losing to Arkansas' Aurelija Misevcuite in the semifinals. Ute Schnoy (Altenstadt, Germany) lost in the quarterfinals and Voelker and Schnoy lost in the quarterfinals in doubles.   Action continues tomorrow at Michael D. Case Tennis Center.   ITA Central Region Qualifier   Open Singles Quarterfinals Stephani Dalmico (WSU) def. Ute Schnoy (DU) 2-6, 6-3, 7-5 Mallory Voelker (DU) def. Mayori Franco (ARK) 6-3, 4-6, 6-1   Semifinals Aurelija Misevcuite (ARK) def. Voelker (DU) 6-3, 6-1   Open Doubles Quarterfinals Ela Kalunder / Aurellija /Misevcuite (ARK) def. Schnoy / Voleker (DU) 8-6   Consolation Singles Quarterfinals Annette Aksdal (DU) def. Polina Kokoulina (BSU) 6-2, 2-6, 10-7   Semifinals Aksdal (DU) def. Maria Malashnikova (OU) 6-2, 6-4