Merge branch 'Dev' into 'master'

Add citations to ReadMe

See merge request !256
15 jobs for release/0.3.4 in 15 minutes and 22 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Pretest
passed #604089
docker
flake8-lint

00:00:08

passed #604067
cuda docker
minimal-conda

00:00:13

passed #604090
cuda11 AVX docker
tests-and-coverage

00:04:01

87.66%
failed #604068
docker
flake8-lint

00:05:35

failed #604066
AVX cuda11 docker
tests-and-coverage

00:03:54

87.66%
 
  Test
passed #604072
AVX docker
arm64v8

00:04:12

passed #604074
AVX docker
arm64v9

00:10:43

passed #604078
docker
build-documentation

00:00:38

passed #604069
AVX docker
latest-python

00:02:10

passed #604076
cuda docker
minimal-sympy-master

00:01:33

passed #604070
win
minimal-windows

00:11:01

passed #604073
AVX docker
ppc64le

00:05:36

manual #604077
AVX cuda11 docker allowed to fail manual
pycodegen-integration
passed #604075
AVX docker
riscv64

00:06:37

passed #604071
AVX cuda11 docker
ubuntu

00:02:32