@entry{cos-21-aa,
  author = {PJ Costa},
  title = {Select Ideas in Partial Differential Equations},
  journal = {Synthesis Lectures on Mathematics and Statistics,},
  year = 2021,
  url = {{\url{https://www.morganclaypool.com/doi/abs/10.2200/S01080ED1V01Y202102MAS040}}},
  quotes = {This text provides an introduction to the applications and implementations of partial differential equations. The content is structured in three progressive levels which are suited for upper...}
}