Owens, D., Bretzel, R. G., Nuber, U., Landgraf, W., Bradley, C., & Linn, T. (2008). Once-daily basal insulin glargine versus thrice-daily prandial insulin lispro in people with type 2 diabetes on oral hypoglycaemic agents (APOLLO): An open randomised controlled trial. The Lancet, 371(9618), pp. 1073-1084. doi:10.1016/S0140-6736(08)60485-7

Owens, David, Reinhard G. Bretzel, Ulrike Nuber, Wolfgang Landgraf, Clare Bradley, and Thomas Linn. "Once-daily Basal Insulin Glargine Versus Thrice-daily Prandial Insulin Lispro in People With Type 2 Diabetes On Oral Hypoglycaemic Agents (APOLLO): An Open Randomised Controlled Trial." The Lancet 371, no. 9618 (2008): 1073-1084.

Owens, David, et al. "Once-daily Basal Insulin Glargine Versus Thrice-daily Prandial Insulin Lispro in People With Type 2 Diabetes On Oral Hypoglycaemic Agents (APOLLO): An Open Randomised Controlled Trial." The Lancet 371.9618 (2008): 1073-1084.