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Dentro de este Tratado de Derecho de Familia, como es lógico, deben encontrar un sitio destacado las acciones de filiación, ya que de la determinación del estado civil de hijo se derivan todas las consecuencias que hemos analizado al abordar las relaciones paterno filiales, tanto en lo que afecta a los hijos menores de edad como consecuencia del ejercicio de la patria potestad, como cuando son mayores de edad y la ayuda paterna se concreta en la pensión alimenticia. Con razón critica el profesor Ángel M. López López que la regulación que el Código Civil contiene de las acciones filiación es extremadamente casuística: quizás por ello no resulte bien ordenada. De hecho aparecen preceptos cuya ratio no se identifica muy bien, e incluso, por paradójico que parezca, hasta se producen ciertas lagunas evidentemente no requeridas por el legislador, al escapársele algunos supuestos. Además, se produce un cierto solapamiento entre los supuestos de hecho, quizás como consecuencia de que la ley aparezca montada sobre unos pilares que a su vez se interfieren :la determinación, la acreditación y la constatación judiciales. Como en el resto de volúmenes de este Tratado de Derecho de Familia - del magistrado Pérez Martín-, hemos intentado clarificar todo lo relacionado con la filiación de una forma práctica. Para ello, además de los exentos comentarios prácticos, se acompañan imprescindibles reseñas jurisprudenciales, los formularios, los esquemas procesales y los casos prácticos.