Here are some articles on the Vitamin C / Oxalate connection. You can find them in PubMed using the reference numbers. You can find a lot more information at this Yahoo group. Join the group and then do an advanced search of "Susan Owens" as the author (she runs the forum) and "Vitamin C" in the subject.
http://health.groups.yahoo.com/group..._Low_Oxalates/
1. Chest. 2000 Aug;118(2):561-3.[] Links
Acute renal failure, oxalosis, and vitamin C supplementation: a case report and review of the literature.
Mashour S,
Turner JF Jr,
Merrell R.
PMID: 10936161 [PubMed - indexed for MEDLINE]
2. J Am Soc Nephrol. 1996 Nov;7(11):2320-6. Links
Secondary oxalosis: a cause of delayed recovery of renal function in the
setting of acute renal failure.
Alkhunaizi AM,
Chan L.
PMID: 8959621 [PubMed - indexed for MEDLINE]
3. Kidney Int. 2006 Nov;70(10):1672.[] Links
Secondary oxalosis due to excess vitamin C intake.
Nasr SH,
Kashtanova Y,
Levchuk V,
Markowitz GS.
PMID: 17080154 [PubMed - indexed for MEDLINE]
4. Eur J Clin Invest. 1998 Sep;28(9):695-700.[] Links
Relative hyperoxaluria, crystalluria and haematuria after megadose
ingestion of vitamin C.
Auer BL,
Auer D,
Rodgers AL.
PMID: 9767367 [PubMed - indexed for MEDLINE]
5. Nephron. 1989;51(4):536-9. Related Articles, Links
Effect of vitamin C supplementation on renal oxalate deposits in
five-sixths nephrectomized rats.
Ono K, Ono H, Ono T, Kikawa K, Oh Y.
Ono Geka Clinic, Fukuoka, Japan.
PMID: 2739830 [PubMed - indexed for MEDLINE]
6. Am J Kidney Dis. 1986 Dec;8(6):450-4. Related Articles, Links
Bone oxalate in a long-term hemodialysis patient who ingested high
doses of vitamin C.
Ott SM, Andress DL, Sherrard DJ.
PMID: 3812476 [PubMed - indexed for MEDLINE]
7. Klin Wochenschr. 1987 Jan 15;65(2):97-100. Related Articles, Links
Excessive myocardial calcinosis in a chronic hemodialyzed patient.
Zazgornik J, Balcke P, Rokitansky A, Schmidt P, Kopsa H, Minar E,
Graninger W.
PMID: 3560789 [PubMed - indexed for MEDLINE]
8. Clin Nephrol. 1986 Nov;26(5):239-43. Related Articles, Links
Secondary hyperoxalemia caused by vitamin C supplementation in regular
hemodialysis patients.
Ono K.
PMID: 3802587 [PubMed - indexed for MEDLINE]