by Lazo, R.F, Zanabria, E
Published in Revista ecuatoriana de higiene y medicina tropical (1980)

by Takaoka, H, Tada, I, Baba, M, Shimada, M, Lazo, R.F, Rumbea, J, Farias D, R, Guderian, R.H, Amunarriz, M
Published in Japanese journal of parasitology : kiseichugaku zasshi (1988)

by Rumbea G., J, Lazo S., R.F, Cedeno, J.V
Published in Revista ecuatoriana de higiene y medicina tropical (1980)