Except as otherwise provided in the Nebraska Indian Child Welfare Act, upon the filing of a petition for adoption the court shall fix a time for hearing the same. The hearing shall be held not less than four weeks nor more than eight weeks after the filing of such petition unless any party for good cause shown requests a continuance of the hearing or all parties agree to a continuance. The court may require notice of the hearing to be given to the child, if over fourteen years of age, to the natural parent or parents of the child, and to such other interested persons as the judge may, in the exercise of discretion, deem advisable, in the manner provided for service of a summons in a civil action. If the judge directs notice by publication, such notice shall be published three successive weeks in a legal newspaper of general circulation in such county.