1. Is fluorouracil (FU) plus placebo as effective as equitoxic doses of FU plus high dose oral leucovorin in colorectal cancer?;Brenckmann,1990
2. Prospective randomized trial comparing 5-FU versus 5-FU and high dose folinic acid for treatment of advanced colorectal cancer;Doroshow,1987
3. A randomized trial of fluorouracil and folinic acid in patients with metastatic colorectal carcinoma;Erlichmann;J. Clin. Oncol.,1988
4. Sequential methotrexate and 5-fluorouracil in breast cancer resistant to the conventional application of these drugs;Herrmann;Cancer Treat. Rep.,1984
5. Sequential methotrexate and 5-fluorouracil;Herrmann,1984