Mechanism of action of hormonal preparations used for emergency contraception: a review of the literature
Croxatto, Horacio B.; Devoto, Luigi; Durand, Marta; Ezcurra, Enrique; Larrea, Fernando; Nagle, Carlos; Ortiz, María Elena; Vantman, David; Vega Blanco, María Margarita; Von Hertzen, Helena (Elsevier, 2001)