Widiger, T. A., & Sanderson, C. (1969). The convergent and discriminant validity of the MCMI as a measure of the DSM-III personality disorders. Journal Of Personality Assessment, 51(2), 228-42. https://doi.org/10.1207/s15327752jpa5102_7(Original work published 1969)
Widiger, T. A., Sanderson, C., & Warner, L. (1969). The MMPI, prototypal typology, and borderline personality disorder. Journal Of Personality Assessment, 50(4), 540-53. https://doi.org/10.1207/s15327752jpa5004_2(Original work published 1969)