@article{10_4153_S0008414X20000097,
     author = {Chao, Zhang and Torrea, Jos\'e L.},
     title = {Boundedness of {Differential} {Transforms} for {Heat} {Semigroups} {Generated} by {Schr\"odinger} {Operators}},
     journal = {Canadian journal of mathematics},
     pages = {622--655},
     year = {2021},
     volume = {73},
     number = {3},
     doi = {10.4153/S0008414X20000097},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008414X20000097/}
}