1) Hucker GJ, Conn HJ : Further studies on the methods of gram staining. Tech Bull 128:1-34,1927
2) Kopeloff N, Beerman P : Modified gram stains. J Infect Dis 31:480-482,1922
3) Burke V : Notes on the Gram Stain with Description of a New Method. J Bacteriol 7:159-182,1922
4) Simonini A : uber die Einwirkung seltener Erden auf Bakterien. Zentr. Bakt. Parasitenk. Abt I Orig 74:343-348,1914
5) Knaysi G, Hillier J, Fabrocant C : .e cytology of an avian strain of Mycobacterium tuberculosis studied with the electron and light microscopes. J Bacteriol 60:423-447,1950
6) Beguet M : Sur les limites de la specificite de la reaction de Gram. Compt Rend Soc Biol 101:894-895,1929
7) Beguet M : Sur le mecanisme de la methode de Gram. Compt Rend Soc Biol 101:896-897,1929
8) Stearn EW, Stearn AE : .e variation in staining character of bacteria as related to the reserve food material within the organism. Stain Technol 4:105-109,1929