Grollier, G. ., Commeau, P. ., Iselin, M. ., Hiance, J. ., Briand, P. ., Foucault, J. ., & Potier, J. . (1984). Transitory appearance of collateral circulation during coronary spasm . Archives Des Maladies Du Coeur Et Des Vaisseaux, 77(12), 1407-10.