1. Bioerodible polymers in controlled drug delivery;Heller,1984
2. In vitro and in vivo release of levonorgestrel from poly(ortho esters). I. Linear Polymers;Heller;J. Controlled Release,1985
3. Preparation of poly(ortho esters) by the reaction of diketene acetals and polyols;Heller;J. Polym. Sci., Polym. Lett. Ed.,1980
4. Release of norethindrone from polyacetals and poly(ortho esters);Heller,1981
5. Release of norethindrone from poly(ortho esters);Heller;Polym. Eng. Sci.,1981