A generalized first-return integration process

We extend the first-return integration process, introduced in [5] by U.B. Darji and M.J. Evans, and prove that each Lebesgue-improper integrable function f : [a, b] --> R is first-return integrable in this generalized sense to (Li)int_a^b f(t) dt.

LC- MS/MS method for determination of clenbuterol and clenbuterol-like anabolic drugs in meat and liver –Po-05 pag 47