Volume 12, Issue 1 Z. Drici Farzana A. McRae Vasundhara Devi Variation of parameters for differential equations with causal maps Downloads Abstract PDF Full article PDF DOI { copied = true; setTimeout(() => copied = false, 2000) })" :aria-label="copied ? 'DOI copied' : 'Copy DOI'" :title="copied ? 'Copied' : 'Copy DOI'" > Find all available articles from these authors Z. Drici Farzana A. McRae Vasundhara Devi Find more articles with the same keywords causal operators variation of parameters Find more articles with the same subject classes 34D20