by Bateson, Eric M., Hayes, J. A., Woo-Ming, Michael
Published in Thorax (01.01.1968)

by Persaud, Vasil, Woo-Ming, Michael O.
Published in British journal of diseases of the chest (01.01.1974)

by By Michael Schuman and Chang Woo Hyuk
Published in The Wall Street journal. Eastern edition (11.12.1997)

by Michael Schuman y Chang Woo Hyuk
Published in Reforma (Mexico City, Mexico : 1993) (11.12.1997)

by Michael Schuman y Chang Woo Hyuk
Published in El norte (11.12.1997)