Bartels Madrigal, G., Herrera Echeverría, A., Salas Chaves, P., Sierra Ramos, R., & Lomonte, B. (1995). Antibodies to Helicobacter pylori in dyspeptic patients, asymptomatic adults, and children from Costa Rica.

Bartels Madrigal, Giselle, Adelita Herrera Echeverría, Pilar Salas Chaves, Rafaela Sierra Ramos, و Bruno Lomonte. Antibodies to Helicobacter Pylori in Dyspeptic Patients, Asymptomatic Adults, and Children From Costa Rica. 1995.

Bartels Madrigal, Giselle, et al. Antibodies to Helicobacter Pylori in Dyspeptic Patients, Asymptomatic Adults, and Children From Costa Rica. 1995.